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Finding the Fourth Proportional to 457.29, 631.33 and 291.76

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Solution

The fourth proportional to 457.29, 631.33 and 291.76 is: 402.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.29 : 631.33 = 291.76 : x
  2. Step 2: Convert to fraction form
    457.29/631.33 = 291.76/x
  3. Step 3: Cross multiply
    457.29x = 631.33 × 291.76
  4. Step 4: Simplify right side
    457.29x = 184,194.53
  5. Step 5: Solve for x
    x = 184,194.53/457.29
  6. Step 6: Final answer
    x = 402.80

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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.