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Finding the Fourth Proportional to 279,894.74, 386,240.17 and 159,019.25

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Solution

The fourth proportional to 279,894.74, 386,240.17 and 159,019.25 is: 219,438.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,894.74 : 386,240.17 = 159,019.25 : x
  2. Step 2: Convert to fraction form
    279,894.74/386,240.17 = 159,019.25/x
  3. Step 3: Cross multiply
    279,894.74x = 386,240.17 × 159,019.25
  4. Step 4: Simplify right side
    279,894.74x = 61,419,621,358.18
  5. Step 5: Solve for x
    x = 61,419,621,358.18/279,894.74
  6. Step 6: Final answer
    x = 219,438.28

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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.