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Finding the Fourth Proportional to 545.16, 817.55 and 179.90

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Solution

The fourth proportional to 545.16, 817.55 and 179.90 is: 269.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.16 : 817.55 = 179.90 : x
  2. Step 2: Convert to fraction form
    545.16/817.55 = 179.90/x
  3. Step 3: Cross multiply
    545.16x = 817.55 × 179.90
  4. Step 4: Simplify right side
    545.16x = 147,072.26
  5. Step 5: Solve for x
    x = 147,072.26/545.16
  6. Step 6: Final answer
    x = 269.78

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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.