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Finding the Fourth Proportional to 640,008.80, 960,013.20 and 440,943.20

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Solution

The fourth proportional to 640,008.80, 960,013.20 and 440,943.20 is: 661,414.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,008.80 : 960,013.20 = 440,943.20 : x
  2. Step 2: Convert to fraction form
    640,008.80/960,013.20 = 440,943.20/x
  3. Step 3: Cross multiply
    640,008.80x = 960,013.20 × 440,943.20
  4. Step 4: Simplify right side
    640,008.80x = 423,311,292,450.24
  5. Step 5: Solve for x
    x = 423,311,292,450.24/640,008.80
  6. Step 6: Final answer
    x = 661,414.80

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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.