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Finding the Fourth Proportional to 1,008.38, 1,512.68 and 488.98

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Solution

The fourth proportional to 1,008.38, 1,512.68 and 488.98 is: 733.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.38 : 1,512.68 = 488.98 : x
  2. Step 2: Convert to fraction form
    1,008.38/1,512.68 = 488.98/x
  3. Step 3: Cross multiply
    1,008.38x = 1,512.68 × 488.98
  4. Step 4: Simplify right side
    1,008.38x = 739,670.27
  5. Step 5: Solve for x
    x = 739,670.27/1,008.38
  6. Step 6: Final answer
    x = 733.52

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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.