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Finding the Fourth Proportional to 472.43, 708.87 and 316.35

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Solution

The fourth proportional to 472.43, 708.87 and 316.35 is: 474.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.43 : 708.87 = 316.35 : x
  2. Step 2: Convert to fraction form
    472.43/708.87 = 316.35/x
  3. Step 3: Cross multiply
    472.43x = 708.87 × 316.35
  4. Step 4: Simplify right side
    472.43x = 224,251.02
  5. Step 5: Solve for x
    x = 224,251.02/472.43
  6. Step 6: Final answer
    x = 474.68

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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.