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Finding the Fourth Proportional to 404,612.80, 606,919.20 and 138,309.10

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Solution

The fourth proportional to 404,612.80, 606,919.20 and 138,309.10 is: 207,463.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,612.80 : 606,919.20 = 138,309.10 : x
  2. Step 2: Convert to fraction form
    404,612.80/606,919.20 = 138,309.10/x
  3. Step 3: Cross multiply
    404,612.80x = 606,919.20 × 138,309.10
  4. Step 4: Simplify right side
    404,612.80x = 83,942,448,324.72
  5. Step 5: Solve for x
    x = 83,942,448,324.72/404,612.80
  6. Step 6: Final answer
    x = 207,463.65

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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.