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Finding the Fourth Proportional to 545.76, 753.33 and 324.78

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Solution

The fourth proportional to 545.76, 753.33 and 324.78 is: 448.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.76 : 753.33 = 324.78 : x
  2. Step 2: Convert to fraction form
    545.76/753.33 = 324.78/x
  3. Step 3: Cross multiply
    545.76x = 753.33 × 324.78
  4. Step 4: Simplify right side
    545.76x = 244,666.52
  5. Step 5: Solve for x
    x = 244,666.52/545.76
  6. Step 6: Final answer
    x = 448.30

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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.