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Finding the Fourth Proportional to 280,380.89, 386,920.60 and 159,519.58

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Solution

The fourth proportional to 280,380.89, 386,920.60 and 159,519.58 is: 220,134.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,380.89 : 386,920.60 = 159,519.58 : x
  2. Step 2: Convert to fraction form
    280,380.89/386,920.60 = 159,519.58/x
  3. Step 3: Cross multiply
    280,380.89x = 386,920.60 × 159,519.58
  4. Step 4: Simplify right side
    280,380.89x = 61,721,410,239.25
  5. Step 5: Solve for x
    x = 61,721,410,239.25/280,380.89
  6. Step 6: Final answer
    x = 220,134.15

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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.