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Finding the Fourth Proportional to 278,476.96, 417,153.56 and 128,508.88

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Solution

The fourth proportional to 278,476.96, 417,153.56 and 128,508.88 is: 192,504.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,476.96 : 417,153.56 = 128,508.88 : x
  2. Step 2: Convert to fraction form
    278,476.96/417,153.56 = 128,508.88/x
  3. Step 3: Cross multiply
    278,476.96x = 417,153.56 × 128,508.88
  4. Step 4: Simplify right side
    278,476.96x = 53,607,936,783.61
  5. Step 5: Solve for x
    x = 53,607,936,783.61/278,476.96
  6. Step 6: Final answer
    x = 192,504.03

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1.5x scale

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.