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Finding the Fourth Proportional to 545.26, 752.50 and 312.42

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Solution

The fourth proportional to 545.26, 752.50 and 312.42 is: 431.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.26 : 752.50 = 312.42 : x
  2. Step 2: Convert to fraction form
    545.26/752.50 = 312.42/x
  3. Step 3: Cross multiply
    545.26x = 752.50 × 312.42
  4. Step 4: Simplify right side
    545.26x = 235,096.05
  5. Step 5: Solve for x
    x = 235,096.05/545.26
  6. Step 6: Final answer
    x = 431.16

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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.