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Finding the Fourth Proportional to 1,006.60, 1,387.14 and 757.48

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Solution

The fourth proportional to 1,006.60, 1,387.14 and 757.48 is: 1,043.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,006.60 : 1,387.14 = 757.48 : x
  2. Step 2: Convert to fraction form
    1,006.60/1,387.14 = 757.48/x
  3. Step 3: Cross multiply
    1,006.60x = 1,387.14 × 757.48
  4. Step 4: Simplify right side
    1,006.60x = 1,050,730.81
  5. Step 5: Solve for x
    x = 1,050,730.81/1,006.60
  6. Step 6: Final answer
    x = 1,043.84

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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.