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Finding the Fourth Proportional to 500.61, 749.48 and 418.53

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Solution

The fourth proportional to 500.61, 749.48 and 418.53 is: 626.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.61 : 749.48 = 418.53 : x
  2. Step 2: Convert to fraction form
    500.61/749.48 = 418.53/x
  3. Step 3: Cross multiply
    500.61x = 749.48 × 418.53
  4. Step 4: Simplify right side
    500.61x = 313,677.77
  5. Step 5: Solve for x
    x = 313,677.77/500.61
  6. Step 6: Final answer
    x = 626.59

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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.