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Finding the Fourth Proportional to 545.10, 817.67 and 454.44

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Solution

The fourth proportional to 545.10, 817.67 and 454.44 is: 681.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.10 : 817.67 = 454.44 : x
  2. Step 2: Convert to fraction form
    545.10/817.67 = 454.44/x
  3. Step 3: Cross multiply
    545.10x = 817.67 × 454.44
  4. Step 4: Simplify right side
    545.10x = 371,581.95
  5. Step 5: Solve for x
    x = 371,581.95/545.10
  6. Step 6: Final answer
    x = 681.68

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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.