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Finding the Fourth Proportional to 485.72, 726.96 and 474.92

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Solution

The fourth proportional to 485.72, 726.96 and 474.92 is: 710.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.72 : 726.96 = 474.92 : x
  2. Step 2: Convert to fraction form
    485.72/726.96 = 474.92/x
  3. Step 3: Cross multiply
    485.72x = 726.96 × 474.92
  4. Step 4: Simplify right side
    485.72x = 345,247.84
  5. Step 5: Solve for x
    x = 345,247.84/485.72
  6. Step 6: Final answer
    x = 710.80

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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.