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Finding the Fourth Proportional to 279,779.76, 386,242.20 and 217,552.32

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Solution

The fourth proportional to 279,779.76, 386,242.20 and 217,552.32 is: 300,335.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,779.76 : 386,242.20 = 217,552.32 : x
  2. Step 2: Convert to fraction form
    279,779.76/386,242.20 = 217,552.32/x
  3. Step 3: Cross multiply
    279,779.76x = 386,242.20 × 217,552.32
  4. Step 4: Simplify right side
    279,779.76x = 84,027,886,691.90
  5. Step 5: Solve for x
    x = 84,027,886,691.90/279,779.76
  6. Step 6: Final answer
    x = 300,335.83

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1.5x scale

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.