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Finding the Fourth Proportional to 284,841.40, 427,286.49 and 74,479

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Solution

The fourth proportional to 284,841.40, 427,286.49 and 74,479 is: 111,724.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,841.40 : 427,286.49 = 74,479 : x
  2. Step 2: Convert to fraction form
    284,841.40/427,286.49 = 74,479/x
  3. Step 3: Cross multiply
    284,841.40x = 427,286.49 × 74,479
  4. Step 4: Simplify right side
    284,841.40x = 31,823,870,488.71
  5. Step 5: Solve for x
    x = 31,823,870,488.71/284,841.40
  6. Step 6: Final answer
    x = 111,724.88

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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.