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Finding the Fourth Proportional to 457.18, 631.06 and 407.97

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Solution

The fourth proportional to 457.18, 631.06 and 407.97 is: 563.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.18 : 631.06 = 407.97 : x
  2. Step 2: Convert to fraction form
    457.18/631.06 = 407.97/x
  3. Step 3: Cross multiply
    457.18x = 631.06 × 407.97
  4. Step 4: Simplify right side
    457.18x = 257,452.53
  5. Step 5: Solve for x
    x = 257,452.53/457.18
  6. Step 6: Final answer
    x = 563.13

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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.