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Finding the Fourth Proportional to 819,774.40, 1,229,661.60 and 788,281.60

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Solution

The fourth proportional to 819,774.40, 1,229,661.60 and 788,281.60 is: 1,182,422.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,774.40 : 1,229,661.60 = 788,281.60 : x
  2. Step 2: Convert to fraction form
    819,774.40/1,229,661.60 = 788,281.60/x
  3. Step 3: Cross multiply
    819,774.40x = 1,229,661.60 × 788,281.60
  4. Step 4: Simplify right side
    819,774.40x = 969,319,613,506.56
  5. Step 5: Solve for x
    x = 969,319,613,506.56/819,774.40
  6. Step 6: Final answer
    x = 1,182,422.40

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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.