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Finding the Fourth Proportional to 485,178.96, 669,545.28 and 270,321.60

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Solution

The fourth proportional to 485,178.96, 669,545.28 and 270,321.60 is: 373,042.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,178.96 : 669,545.28 = 270,321.60 : x
  2. Step 2: Convert to fraction form
    485,178.96/669,545.28 = 270,321.60/x
  3. Step 3: Cross multiply
    485,178.96x = 669,545.28 × 270,321.60
  4. Step 4: Simplify right side
    485,178.96x = 180,992,551,362.05
  5. Step 5: Solve for x
    x = 180,992,551,362.05/485,178.96
  6. Step 6: Final answer
    x = 373,042.87

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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.