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Finding the Fourth Proportional to 750.03, 1,125.45 and 711.15

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Solution

The fourth proportional to 750.03, 1,125.45 and 711.15 is: 1,067.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.03 : 1,125.45 = 711.15 : x
  2. Step 2: Convert to fraction form
    750.03/1,125.45 = 711.15/x
  3. Step 3: Cross multiply
    750.03x = 1,125.45 × 711.15
  4. Step 4: Simplify right side
    750.03x = 800,363.77
  5. Step 5: Solve for x
    x = 800,363.77/750.03
  6. Step 6: Final answer
    x = 1,067.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.