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Finding the Fourth Proportional to 628.29, 868.19 and 545.13

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Solution

The fourth proportional to 628.29, 868.19 and 545.13 is: 753.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.29 : 868.19 = 545.13 : x
  2. Step 2: Convert to fraction form
    628.29/868.19 = 545.13/x
  3. Step 3: Cross multiply
    628.29x = 868.19 × 545.13
  4. Step 4: Simplify right side
    628.29x = 473,273.69
  5. Step 5: Solve for x
    x = 473,273.69/628.29
  6. Step 6: Final answer
    x = 753.27

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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.