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Finding the Fourth Proportional to 509.22, 763.50 and 432.20

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Solution

The fourth proportional to 509.22, 763.50 and 432.20 is: 648.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.22 : 763.50 = 432.20 : x
  2. Step 2: Convert to fraction form
    509.22/763.50 = 432.20/x
  3. Step 3: Cross multiply
    509.22x = 763.50 × 432.20
  4. Step 4: Simplify right side
    509.22x = 329,984.70
  5. Step 5: Solve for x
    x = 329,984.70/509.22
  6. Step 6: Final answer
    x = 648.02

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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.