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Finding the Fourth Proportional to 571,399.78, 788,478.66 and 316,729.30

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Solution

The fourth proportional to 571,399.78, 788,478.66 and 316,729.30 is: 437,057.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,399.78 : 788,478.66 = 316,729.30 : x
  2. Step 2: Convert to fraction form
    571,399.78/788,478.66 = 316,729.30/x
  3. Step 3: Cross multiply
    571,399.78x = 788,478.66 × 316,729.30
  4. Step 4: Simplify right side
    571,399.78x = 249,734,294,046.74
  5. Step 5: Solve for x
    x = 249,734,294,046.74/571,399.78
  6. Step 6: Final answer
    x = 437,057.04

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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.