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Finding the Fourth Proportional to 440,998.40, 660,817.20 and 328,149.20

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Solution

The fourth proportional to 440,998.40, 660,817.20 and 328,149.20 is: 491,717.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,998.40 : 660,817.20 = 328,149.20 : x
  2. Step 2: Convert to fraction form
    440,998.40/660,817.20 = 328,149.20/x
  3. Step 3: Cross multiply
    440,998.40x = 660,817.20 × 328,149.20
  4. Step 4: Simplify right side
    440,998.40x = 216,846,635,526.24
  5. Step 5: Solve for x
    x = 216,846,635,526.24/440,998.40
  6. Step 6: Final answer
    x = 491,717.51

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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.