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Finding the Fourth Proportional to 420,248.67, 630,377.31 and 120,728.49

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Solution

The fourth proportional to 420,248.67, 630,377.31 and 120,728.49 is: 181,093.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,248.67 : 630,377.31 = 120,728.49 : x
  2. Step 2: Convert to fraction form
    420,248.67/630,377.31 = 120,728.49/x
  3. Step 3: Cross multiply
    420,248.67x = 630,377.31 × 120,728.49
  4. Step 4: Simplify right side
    420,248.67x = 76,104,500,766.56
  5. Step 5: Solve for x
    x = 76,104,500,766.56/420,248.67
  6. Step 6: Final answer
    x = 181,093.97

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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.