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Finding the Fourth Proportional to 1,006.57, 1,389.12 and 757.44

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Solution

The fourth proportional to 1,006.57, 1,389.12 and 757.44 is: 1,045.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,006.57 : 1,389.12 = 757.44 : x
  2. Step 2: Convert to fraction form
    1,006.57/1,389.12 = 757.44/x
  3. Step 3: Cross multiply
    1,006.57x = 1,389.12 × 757.44
  4. Step 4: Simplify right side
    1,006.57x = 1,052,175.05
  5. Step 5: Solve for x
    x = 1,052,175.05/1,006.57
  6. Step 6: Final answer
    x = 1,045.31

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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.