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Finding the Fourth Proportional to 457.11, 631.07 and 291.46

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Solution

The fourth proportional to 457.11, 631.07 and 291.46 is: 402.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.11 : 631.07 = 291.46 : x
  2. Step 2: Convert to fraction form
    457.11/631.07 = 291.46/x
  3. Step 3: Cross multiply
    457.11x = 631.07 × 291.46
  4. Step 4: Simplify right side
    457.11x = 183,931.66
  5. Step 5: Solve for x
    x = 183,931.66/457.11
  6. Step 6: Final answer
    x = 402.38

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.