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Finding the Fourth Proportional to 472.43, 708.60 and 319.34

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Solution

The fourth proportional to 472.43, 708.60 and 319.34 is: 478.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.43 : 708.60 = 319.34 : x
  2. Step 2: Convert to fraction form
    472.43/708.60 = 319.34/x
  3. Step 3: Cross multiply
    472.43x = 708.60 × 319.34
  4. Step 4: Simplify right side
    472.43x = 226,287.29
  5. Step 5: Solve for x
    x = 226,287.29/472.43
  6. Step 6: Final answer
    x = 478.98

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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.