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Finding the Fourth Proportional to 1,455.85, 2,008.92 and 866.31

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Solution

The fourth proportional to 1,455.85, 2,008.92 and 866.31 is: 1,195.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.85 : 2,008.92 = 866.31 : x
  2. Step 2: Convert to fraction form
    1,455.85/2,008.92 = 866.31/x
  3. Step 3: Cross multiply
    1,455.85x = 2,008.92 × 866.31
  4. Step 4: Simplify right side
    1,455.85x = 1,740,337.44
  5. Step 5: Solve for x
    x = 1,740,337.44/1,455.85
  6. Step 6: Final answer
    x = 1,195.41

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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.