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Finding the Fourth Proportional to 1,487.87, 2,053.50 and 965.42

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Solution

The fourth proportional to 1,487.87, 2,053.50 and 965.42 is: 1,332.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.87 : 2,053.50 = 965.42 : x
  2. Step 2: Convert to fraction form
    1,487.87/2,053.50 = 965.42/x
  3. Step 3: Cross multiply
    1,487.87x = 2,053.50 × 965.42
  4. Step 4: Simplify right side
    1,487.87x = 1,982,489.97
  5. Step 5: Solve for x
    x = 1,982,489.97/1,487.87
  6. Step 6: Final answer
    x = 1,332.43

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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.