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Finding the Fourth Proportional to 1,005.54, 1,500.84 and 866.11

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Solution

The fourth proportional to 1,005.54, 1,500.84 and 866.11 is: 1,292.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005.54 : 1,500.84 = 866.11 : x
  2. Step 2: Convert to fraction form
    1,005.54/1,500.84 = 866.11/x
  3. Step 3: Cross multiply
    1,005.54x = 1,500.84 × 866.11
  4. Step 4: Simplify right side
    1,005.54x = 1,299,892.53
  5. Step 5: Solve for x
    x = 1,299,892.53/1,005.54
  6. Step 6: Final answer
    x = 1,292.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.