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Finding the Fourth Proportional to 1,153.92, 1,587.57 and 1,006.89

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Solution

The fourth proportional to 1,153.92, 1,587.57 and 1,006.89 is: 1,385.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.92 : 1,587.57 = 1,006.89 : x
  2. Step 2: Convert to fraction form
    1,153.92/1,587.57 = 1,006.89/x
  3. Step 3: Cross multiply
    1,153.92x = 1,587.57 × 1,006.89
  4. Step 4: Simplify right side
    1,153.92x = 1,598,508.36
  5. Step 5: Solve for x
    x = 1,598,508.36/1,153.92
  6. Step 6: Final answer
    x = 1,385.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.