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Finding the Fourth Proportional to 545.12, 817.64 and 237.20

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Solution

The fourth proportional to 545.12, 817.64 and 237.20 is: 355.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.12 : 817.64 = 237.20 : x
  2. Step 2: Convert to fraction form
    545.12/817.64 = 237.20/x
  3. Step 3: Cross multiply
    545.12x = 817.64 × 237.20
  4. Step 4: Simplify right side
    545.12x = 193,940.12
  5. Step 5: Solve for x
    x = 193,940.12/545.12
  6. Step 6: Final answer
    x = 355.78

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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.