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Finding the Fourth Proportional to 411.84, 617.70 and 151.80

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Solution

The fourth proportional to 411.84, 617.70 and 151.80 is: 227.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.84 : 617.70 = 151.80 : x
  2. Step 2: Convert to fraction form
    411.84/617.70 = 151.80/x
  3. Step 3: Cross multiply
    411.84x = 617.70 × 151.80
  4. Step 4: Simplify right side
    411.84x = 93,766.86
  5. Step 5: Solve for x
    x = 93,766.86/411.84
  6. Step 6: Final answer
    x = 227.68

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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.