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Finding the Fourth Proportional to 457.23, 631.18 and 291.66

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Solution

The fourth proportional to 457.23, 631.18 and 291.66 is: 402.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.23 : 631.18 = 291.66 : x
  2. Step 2: Convert to fraction form
    457.23/631.18 = 291.66/x
  3. Step 3: Cross multiply
    457.23x = 631.18 × 291.66
  4. Step 4: Simplify right side
    457.23x = 184,089.96
  5. Step 5: Solve for x
    x = 184,089.96/457.23
  6. Step 6: Final answer
    x = 402.62

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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.