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Finding the Fourth Proportional to 457.16, 629.52 and 391.52

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Solution

The fourth proportional to 457.16, 629.52 and 391.52 is: 539.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.16 : 629.52 = 391.52 : x
  2. Step 2: Convert to fraction form
    457.16/629.52 = 391.52/x
  3. Step 3: Cross multiply
    457.16x = 629.52 × 391.52
  4. Step 4: Simplify right side
    457.16x = 246,469.67
  5. Step 5: Solve for x
    x = 246,469.67/457.16
  6. Step 6: Final answer
    x = 539.13

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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.