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Finding the Fourth Proportional to 894, 1,234.34 and 545.30

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Solution

The fourth proportional to 894, 1,234.34 and 545.30 is: 752.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    894 : 1,234.34 = 545.30 : x
  2. Step 2: Convert to fraction form
    894/1,234.34 = 545.30/x
  3. Step 3: Cross multiply
    894x = 1,234.34 × 545.30
  4. Step 4: Simplify right side
    894x = 673,076.70
  5. Step 5: Solve for x
    x = 673,076.70/894
  6. Step 6: Final answer
    x = 752.88

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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.