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Finding the Fourth Proportional to 278,363.70, 417,545.55 and 120,899.70

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Solution

The fourth proportional to 278,363.70, 417,545.55 and 120,899.70 is: 181,349.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,363.70 : 417,545.55 = 120,899.70 : x
  2. Step 2: Convert to fraction form
    278,363.70/417,545.55 = 120,899.70/x
  3. Step 3: Cross multiply
    278,363.70x = 417,545.55 × 120,899.70
  4. Step 4: Simplify right side
    278,363.70x = 50,481,131,731.34
  5. Step 5: Solve for x
    x = 50,481,131,731.34/278,363.70
  6. Step 6: Final answer
    x = 181,349.55

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Similar ratio
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1.5x scale

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.