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Finding the Fourth Proportional to 279,690.15, 386,000.28 and 170,788.48

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Solution

The fourth proportional to 279,690.15, 386,000.28 and 170,788.48 is: 235,705.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,690.15 : 386,000.28 = 170,788.48 : x
  2. Step 2: Convert to fraction form
    279,690.15/386,000.28 = 170,788.48/x
  3. Step 3: Cross multiply
    279,690.15x = 386,000.28 × 170,788.48
  4. Step 4: Simplify right side
    279,690.15x = 65,924,400,673.80
  5. Step 5: Solve for x
    x = 65,924,400,673.80/279,690.15
  6. Step 6: Final answer
    x = 235,705.13

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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.