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Finding the Fourth Proportional to 279,825.28, 386,126.40 and 170,874.88

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Solution

The fourth proportional to 279,825.28, 386,126.40 and 170,874.88 is: 235,787.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,825.28 : 386,126.40 = 170,874.88 : x
  2. Step 2: Convert to fraction form
    279,825.28/386,126.40 = 170,874.88/x
  3. Step 3: Cross multiply
    279,825.28x = 386,126.40 × 170,874.88
  4. Step 4: Simplify right side
    279,825.28x = 65,979,302,264.83
  5. Step 5: Solve for x
    x = 65,979,302,264.83/279,825.28
  6. Step 6: Final answer
    x = 235,787.50

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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.