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Finding the Fourth Proportional to 717,853,034.79, 990,641,506.60 and 400,333,326.60

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Solution

The fourth proportional to 717,853,034.79, 990,641,506.60 and 400,333,326.60 is: 552,462,399.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,853,034.79 : 990,641,506.60 = 400,333,326.60 : x
  2. Step 2: Convert to fraction form
    717,853,034.79/990,641,506.60 = 400,333,326.60/x
  3. Step 3: Cross multiply
    717,853,034.79x = 990,641,506.60 × 400,333,326.60
  4. Step 4: Simplify right side
    717,853,034.79x = 396,586,809,799,259,840
  5. Step 5: Solve for x
    x = 396,586,809,799,259,840/717,853,034.79
  6. Step 6: Final answer
    x = 552,462,399.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.