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Finding the Fourth Proportional to 279,891.87, 386,236.20 and 159,016.38

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Solution

The fourth proportional to 279,891.87, 386,236.20 and 159,016.38 is: 219,434.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,891.87 : 386,236.20 = 159,016.38 : x
  2. Step 2: Convert to fraction form
    279,891.87/386,236.20 = 159,016.38/x
  3. Step 3: Cross multiply
    279,891.87x = 386,236.20 × 159,016.38
  4. Step 4: Simplify right side
    279,891.87x = 61,417,880,417.78
  5. Step 5: Solve for x
    x = 61,417,880,417.78/279,891.87
  6. Step 6: Final answer
    x = 219,434.32

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1.5x scale

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.