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Finding the Fourth Proportional to 278,885.84, 418,356.29 and 89,298.45

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Solution

The fourth proportional to 278,885.84, 418,356.29 and 89,298.45 is: 133,956.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,885.84 : 418,356.29 = 89,298.45 : x
  2. Step 2: Convert to fraction form
    278,885.84/418,356.29 = 89,298.45/x
  3. Step 3: Cross multiply
    278,885.84x = 418,356.29 × 89,298.45
  4. Step 4: Simplify right side
    278,885.84x = 37,358,568,468.00
  5. Step 5: Solve for x
    x = 37,358,568,468.00/278,885.84
  6. Step 6: Final answer
    x = 133,956.49

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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.