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Finding the Fourth Proportional to 1,031.53, 1,545.15 and 753.70

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Solution

The fourth proportional to 1,031.53, 1,545.15 and 753.70 is: 1,128.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.53 : 1,545.15 = 753.70 : x
  2. Step 2: Convert to fraction form
    1,031.53/1,545.15 = 753.70/x
  3. Step 3: Cross multiply
    1,031.53x = 1,545.15 × 753.70
  4. Step 4: Simplify right side
    1,031.53x = 1,164,579.56
  5. Step 5: Solve for x
    x = 1,164,579.56/1,031.53
  6. Step 6: Final answer
    x = 1,128.98

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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.