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Finding the Fourth Proportional to 474.57, 654.14 and 316.89

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Solution

The fourth proportional to 474.57, 654.14 and 316.89 is: 436.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.57 : 654.14 = 316.89 : x
  2. Step 2: Convert to fraction form
    474.57/654.14 = 316.89/x
  3. Step 3: Cross multiply
    474.57x = 654.14 × 316.89
  4. Step 4: Simplify right side
    474.57x = 207,287.15
  5. Step 5: Solve for x
    x = 207,287.15/474.57
  6. Step 6: Final answer
    x = 436.79

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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.