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Finding the Fourth Proportional to 1,002.38, 1,504.37 and 515.57

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Solution

The fourth proportional to 1,002.38, 1,504.37 and 515.57 is: 773.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.38 : 1,504.37 = 515.57 : x
  2. Step 2: Convert to fraction form
    1,002.38/1,504.37 = 515.57/x
  3. Step 3: Cross multiply
    1,002.38x = 1,504.37 × 515.57
  4. Step 4: Simplify right side
    1,002.38x = 775,601.81
  5. Step 5: Solve for x
    x = 775,601.81/1,002.38
  6. Step 6: Final answer
    x = 773.76

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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.