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Finding the Fourth Proportional to 545.60, 817.20 and 484.80

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Solution

The fourth proportional to 545.60, 817.20 and 484.80 is: 726.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.60 : 817.20 = 484.80 : x
  2. Step 2: Convert to fraction form
    545.60/817.20 = 484.80/x
  3. Step 3: Cross multiply
    545.60x = 817.20 × 484.80
  4. Step 4: Simplify right side
    545.60x = 396,178.56
  5. Step 5: Solve for x
    x = 396,178.56/545.60
  6. Step 6: Final answer
    x = 726.13

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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.