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Finding the Fourth Proportional to 457.38, 631.26 and 291.66

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Solution

The fourth proportional to 457.38, 631.26 and 291.66 is: 402.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.38 : 631.26 = 291.66 : x
  2. Step 2: Convert to fraction form
    457.38/631.26 = 291.66/x
  3. Step 3: Cross multiply
    457.38x = 631.26 × 291.66
  4. Step 4: Simplify right side
    457.38x = 184,113.29
  5. Step 5: Solve for x
    x = 184,113.29/457.38
  6. Step 6: Final answer
    x = 402.54

Related Problems

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Double scale
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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.