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Finding the Fourth Proportional to 819,799,217.20, 1,229,698,825.80 and 740,720,796.40

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Solution

The fourth proportional to 819,799,217.20, 1,229,698,825.80 and 740,720,796.40 is: 1,111,081,194.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,799,217.20 : 1,229,698,825.80 = 740,720,796.40 : x
  2. Step 2: Convert to fraction form
    819,799,217.20/1,229,698,825.80 = 740,720,796.40/x
  3. Step 3: Cross multiply
    819,799,217.20x = 1,229,698,825.80 × 740,720,796.40
  4. Step 4: Simplify right side
    819,799,217.20x = 910,863,493,578,720,768
  5. Step 5: Solve for x
    x = 910,863,493,578,720,768/819,799,217.20
  6. Step 6: Final answer
    x = 1,111,081,194.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.