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Finding the Fourth Proportional to 628.53, 865.22 and 545.15

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Solution

The fourth proportional to 628.53, 865.22 and 545.15 is: 750.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.53 : 865.22 = 545.15 : x
  2. Step 2: Convert to fraction form
    628.53/865.22 = 545.15/x
  3. Step 3: Cross multiply
    628.53x = 865.22 × 545.15
  4. Step 4: Simplify right side
    628.53x = 471,667.63
  5. Step 5: Solve for x
    x = 471,667.63/628.53
  6. Step 6: Final answer
    x = 750.43

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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.