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Finding the Fourth Proportional to 565.12, 847.68 and 428.41

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Solution

The fourth proportional to 565.12, 847.68 and 428.41 is: 642.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    565.12 : 847.68 = 428.41 : x
  2. Step 2: Convert to fraction form
    565.12/847.68 = 428.41/x
  3. Step 3: Cross multiply
    565.12x = 847.68 × 428.41
  4. Step 4: Simplify right side
    565.12x = 363,154.59
  5. Step 5: Solve for x
    x = 363,154.59/565.12
  6. Step 6: Final answer
    x = 642.62

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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.