Home / 280,335.42-420,574.14-80,651.52

Finding the Fourth Proportional to 280,335.42, 420,574.14 and 80,651.52

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Solution

The fourth proportional to 280,335.42, 420,574.14 and 80,651.52 is: 120,997.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,335.42 : 420,574.14 = 80,651.52 : x
  2. Step 2: Convert to fraction form
    280,335.42/420,574.14 = 80,651.52/x
  3. Step 3: Cross multiply
    280,335.42x = 420,574.14 × 80,651.52
  4. Step 4: Simplify right side
    280,335.42x = 33,919,943,663.69
  5. Step 5: Solve for x
    x = 33,919,943,663.69/280,335.42
  6. Step 6: Final answer
    x = 120,997.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.