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Finding the Fourth Proportional to 500.08, 747.66 and 423.90

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Solution

The fourth proportional to 500.08, 747.66 and 423.90 is: 633.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.08 : 747.66 = 423.90 : x
  2. Step 2: Convert to fraction form
    500.08/747.66 = 423.90/x
  3. Step 3: Cross multiply
    500.08x = 747.66 × 423.90
  4. Step 4: Simplify right side
    500.08x = 316,927.22
  5. Step 5: Solve for x
    x = 316,927.22/500.08
  6. Step 6: Final answer
    x = 633.75

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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.