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Finding the Fourth Proportional to 485,446.92, 669,480.48 and 304,178.28

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Solution

The fourth proportional to 485,446.92, 669,480.48 and 304,178.28 is: 419,492.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,446.92 : 669,480.48 = 304,178.28 : x
  2. Step 2: Convert to fraction form
    485,446.92/669,480.48 = 304,178.28/x
  3. Step 3: Cross multiply
    485,446.92x = 669,480.48 × 304,178.28
  4. Step 4: Simplify right side
    485,446.92x = 203,641,420,899.97
  5. Step 5: Solve for x
    x = 203,641,420,899.97/485,446.92
  6. Step 6: Final answer
    x = 419,492.66

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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.