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Finding the Fourth Proportional to 571,401.78, 788,481.42 and 316,731.30

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Solution

The fourth proportional to 571,401.78, 788,481.42 and 316,731.30 is: 437,059.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,401.78 : 788,481.42 = 316,731.30 : x
  2. Step 2: Convert to fraction form
    571,401.78/788,481.42 = 316,731.30/x
  3. Step 3: Cross multiply
    571,401.78x = 788,481.42 × 316,731.30
  4. Step 4: Simplify right side
    571,401.78x = 249,736,745,182.45
  5. Step 5: Solve for x
    x = 249,736,745,182.45/571,401.78
  6. Step 6: Final answer
    x = 437,059.80

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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.