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Finding the Fourth Proportional to 500.76, 748.80 and 433.08

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Solution

The fourth proportional to 500.76, 748.80 and 433.08 is: 647.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.76 : 748.80 = 433.08 : x
  2. Step 2: Convert to fraction form
    500.76/748.80 = 433.08/x
  3. Step 3: Cross multiply
    500.76x = 748.80 × 433.08
  4. Step 4: Simplify right side
    500.76x = 324,290.30
  5. Step 5: Solve for x
    x = 324,290.30/500.76
  6. Step 6: Final answer
    x = 647.60

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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.