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Finding the Fourth Proportional to 284.07, 391.98 and 159.72

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Solution

The fourth proportional to 284.07, 391.98 and 159.72 is: 220.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.07 : 391.98 = 159.72 : x
  2. Step 2: Convert to fraction form
    284.07/391.98 = 159.72/x
  3. Step 3: Cross multiply
    284.07x = 391.98 × 159.72
  4. Step 4: Simplify right side
    284.07x = 62,607.05
  5. Step 5: Solve for x
    x = 62,607.05/284.07
  6. Step 6: Final answer
    x = 220.39

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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.