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Finding the Fourth Proportional to 545.53, 752.79 and 306.27

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Solution

The fourth proportional to 545.53, 752.79 and 306.27 is: 422.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.53 : 752.79 = 306.27 : x
  2. Step 2: Convert to fraction form
    545.53/752.79 = 306.27/x
  3. Step 3: Cross multiply
    545.53x = 752.79 × 306.27
  4. Step 4: Simplify right side
    545.53x = 230,554.22
  5. Step 5: Solve for x
    x = 230,554.22/545.53
  6. Step 6: Final answer
    x = 422.63

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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.