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Finding the Fourth Proportional to 610.76, 915.03 and 545.15

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Solution

The fourth proportional to 610.76, 915.03 and 545.15 is: 816.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.76 : 915.03 = 545.15 : x
  2. Step 2: Convert to fraction form
    610.76/915.03 = 545.15/x
  3. Step 3: Cross multiply
    610.76x = 915.03 × 545.15
  4. Step 4: Simplify right side
    610.76x = 498,830.89
  5. Step 5: Solve for x
    x = 498,830.89/610.76
  6. Step 6: Final answer
    x = 816.73

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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.