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Finding the Fourth Proportional to 545.47, 817.95 and 198.56

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Solution

The fourth proportional to 545.47, 817.95 and 198.56 is: 297.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.47 : 817.95 = 198.56 : x
  2. Step 2: Convert to fraction form
    545.47/817.95 = 198.56/x
  3. Step 3: Cross multiply
    545.47x = 817.95 × 198.56
  4. Step 4: Simplify right side
    545.47x = 162,411.52
  5. Step 5: Solve for x
    x = 162,411.52/545.47
  6. Step 6: Final answer
    x = 297.75

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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.