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Finding the Fourth Proportional to 565.19, 847.76 and 321.20

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Solution

The fourth proportional to 565.19, 847.76 and 321.20 is: 481.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    565.19 : 847.76 = 321.20 : x
  2. Step 2: Convert to fraction form
    565.19/847.76 = 321.20/x
  3. Step 3: Cross multiply
    565.19x = 847.76 × 321.20
  4. Step 4: Simplify right side
    565.19x = 272,294.67
  5. Step 5: Solve for x
    x = 272,294.67/565.19
  6. Step 6: Final answer
    x = 481.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.