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Finding the Fourth Proportional to 322.62, 439.62 and 315.10

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Solution

The fourth proportional to 322.62, 439.62 and 315.10 is: 429.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.62 : 439.62 = 315.10 : x
  2. Step 2: Convert to fraction form
    322.62/439.62 = 315.10/x
  3. Step 3: Cross multiply
    322.62x = 439.62 × 315.10
  4. Step 4: Simplify right side
    322.62x = 138,523.16
  5. Step 5: Solve for x
    x = 138,523.16/322.62
  6. Step 6: Final answer
    x = 429.37

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.