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Finding the Fourth Proportional to 565.74, 847.86 and 321.90

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Solution

The fourth proportional to 565.74, 847.86 and 321.90 is: 482.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    565.74 : 847.86 = 321.90 : x
  2. Step 2: Convert to fraction form
    565.74/847.86 = 321.90/x
  3. Step 3: Cross multiply
    565.74x = 847.86 × 321.90
  4. Step 4: Simplify right side
    565.74x = 272,926.13
  5. Step 5: Solve for x
    x = 272,926.13/565.74
  6. Step 6: Final answer
    x = 482.42

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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.