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Finding the Fourth Proportional to 284.14, 392.12 and 159.80

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Solution

The fourth proportional to 284.14, 392.12 and 159.80 is: 220.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.14 : 392.12 = 159.80 : x
  2. Step 2: Convert to fraction form
    284.14/392.12 = 159.80/x
  3. Step 3: Cross multiply
    284.14x = 392.12 × 159.80
  4. Step 4: Simplify right side
    284.14x = 62,660.78
  5. Step 5: Solve for x
    x = 62,660.78/284.14
  6. Step 6: Final answer
    x = 220.53

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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.