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Finding the Fourth Proportional to 457.53, 631.89 and 310.56

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Solution

The fourth proportional to 457.53, 631.89 and 310.56 is: 428.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.53 : 631.89 = 310.56 : x
  2. Step 2: Convert to fraction form
    457.53/631.89 = 310.56/x
  3. Step 3: Cross multiply
    457.53x = 631.89 × 310.56
  4. Step 4: Simplify right side
    457.53x = 196,239.76
  5. Step 5: Solve for x
    x = 196,239.76/457.53
  6. Step 6: Final answer
    x = 428.91

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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.