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Finding the Fourth Proportional to 279,690.52, 386,000.80 and 170,788.86

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Solution

The fourth proportional to 279,690.52, 386,000.80 and 170,788.86 is: 235,705.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,690.52 : 386,000.80 = 170,788.86 : x
  2. Step 2: Convert to fraction form
    279,690.52/386,000.80 = 170,788.86/x
  3. Step 3: Cross multiply
    279,690.52x = 386,000.80 × 170,788.86
  4. Step 4: Simplify right side
    279,690.52x = 65,924,634,234.11
  5. Step 5: Solve for x
    x = 65,924,634,234.11/279,690.52
  6. Step 6: Final answer
    x = 235,705.64

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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.