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Finding the Fourth Proportional to 819,798,235.20, 1,229,697,352.80 and 740,719,814.40

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Solution

The fourth proportional to 819,798,235.20, 1,229,697,352.80 and 740,719,814.40 is: 1,111,079,721.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,798,235.20 : 1,229,697,352.80 = 740,719,814.40 : x
  2. Step 2: Convert to fraction form
    819,798,235.20/1,229,697,352.80 = 740,719,814.40/x
  3. Step 3: Cross multiply
    819,798,235.20x = 1,229,697,352.80 × 740,719,814.40
  4. Step 4: Simplify right side
    819,798,235.20x = 910,861,194,934,187,264
  5. Step 5: Solve for x
    x = 910,861,194,934,187,264/819,798,235.20
  6. Step 6: Final answer
    x = 1,111,079,721.60

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Double scale
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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.