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Finding the Fourth Proportional to 545.18, 751.91 and 358.70

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Solution

The fourth proportional to 545.18, 751.91 and 358.70 is: 494.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.18 : 751.91 = 358.70 : x
  2. Step 2: Convert to fraction form
    545.18/751.91 = 358.70/x
  3. Step 3: Cross multiply
    545.18x = 751.91 × 358.70
  4. Step 4: Simplify right side
    545.18x = 269,704.56
  5. Step 5: Solve for x
    x = 269,704.56/545.18
  6. Step 6: Final answer
    x = 494.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.