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Finding the Fourth Proportional to 431.34, 645.90 and 362.52

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Solution

The fourth proportional to 431.34, 645.90 and 362.52 is: 542.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.34 : 645.90 = 362.52 : x
  2. Step 2: Convert to fraction form
    431.34/645.90 = 362.52/x
  3. Step 3: Cross multiply
    431.34x = 645.90 × 362.52
  4. Step 4: Simplify right side
    431.34x = 234,151.67
  5. Step 5: Solve for x
    x = 234,151.67/431.34
  6. Step 6: Final answer
    x = 542.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.