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Finding the Fourth Proportional to 279,426.28, 419,139.56 and 92,437.78

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Solution

The fourth proportional to 279,426.28, 419,139.56 and 92,437.78 is: 138,656.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,426.28 : 419,139.56 = 92,437.78 : x
  2. Step 2: Convert to fraction form
    279,426.28/419,139.56 = 92,437.78/x
  3. Step 3: Cross multiply
    279,426.28x = 419,139.56 × 92,437.78
  4. Step 4: Simplify right side
    279,426.28x = 38,744,330,436.58
  5. Step 5: Solve for x
    x = 38,744,330,436.58/279,426.28
  6. Step 6: Final answer
    x = 138,656.72

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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.