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Finding the Fourth Proportional to 1,140.03, 1,572.84 and 747.30

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Solution

The fourth proportional to 1,140.03, 1,572.84 and 747.30 is: 1,031.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.03 : 1,572.84 = 747.30 : x
  2. Step 2: Convert to fraction form
    1,140.03/1,572.84 = 747.30/x
  3. Step 3: Cross multiply
    1,140.03x = 1,572.84 × 747.30
  4. Step 4: Simplify right side
    1,140.03x = 1,175,383.33
  5. Step 5: Solve for x
    x = 1,175,383.33/1,140.03
  6. Step 6: Final answer
    x = 1,031.01

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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.