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Finding the Fourth Proportional to 916.46, 1,373.29 and 545.53

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Solution

The fourth proportional to 916.46, 1,373.29 and 545.53 is: 817.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.46 : 1,373.29 = 545.53 : x
  2. Step 2: Convert to fraction form
    916.46/1,373.29 = 545.53/x
  3. Step 3: Cross multiply
    916.46x = 1,373.29 × 545.53
  4. Step 4: Simplify right side
    916.46x = 749,170.89
  5. Step 5: Solve for x
    x = 749,170.89/916.46
  6. Step 6: Final answer
    x = 817.46

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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.