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Finding the Fourth Proportional to 279,691.78, 386,002.52 and 170,790.10

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Solution

The fourth proportional to 279,691.78, 386,002.52 and 170,790.10 is: 235,707.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,691.78 : 386,002.52 = 170,790.10 : x
  2. Step 2: Convert to fraction form
    279,691.78/386,002.52 = 170,790.10/x
  3. Step 3: Cross multiply
    279,691.78x = 386,002.52 × 170,790.10
  4. Step 4: Simplify right side
    279,691.78x = 65,925,408,991.05
  5. Step 5: Solve for x
    x = 65,925,408,991.05/279,691.78
  6. Step 6: Final answer
    x = 235,707.35

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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.