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Finding the Fourth Proportional to 457.18, 630.96 and 317.26

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Solution

The fourth proportional to 457.18, 630.96 and 317.26 is: 437.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.18 : 630.96 = 317.26 : x
  2. Step 2: Convert to fraction form
    457.18/630.96 = 317.26/x
  3. Step 3: Cross multiply
    457.18x = 630.96 × 317.26
  4. Step 4: Simplify right side
    457.18x = 200,178.37
  5. Step 5: Solve for x
    x = 200,178.37/457.18
  6. Step 6: Final answer
    x = 437.85

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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.