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Finding the Fourth Proportional to 545.66, 819.53 and 340.61

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Solution

The fourth proportional to 545.66, 819.53 and 340.61 is: 511.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.66 : 819.53 = 340.61 : x
  2. Step 2: Convert to fraction form
    545.66/819.53 = 340.61/x
  3. Step 3: Cross multiply
    545.66x = 819.53 × 340.61
  4. Step 4: Simplify right side
    545.66x = 279,138.41
  5. Step 5: Solve for x
    x = 279,138.41/545.66
  6. Step 6: Final answer
    x = 511.56

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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.