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Finding the Fourth Proportional to 440,312.80, 660,469.20 and 300,344.80

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Solution

The fourth proportional to 440,312.80, 660,469.20 and 300,344.80 is: 450,517.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,312.80 : 660,469.20 = 300,344.80 : x
  2. Step 2: Convert to fraction form
    440,312.80/660,469.20 = 300,344.80/x
  3. Step 3: Cross multiply
    440,312.80x = 660,469.20 × 300,344.80
  4. Step 4: Simplify right side
    440,312.80x = 198,368,489,780.16
  5. Step 5: Solve for x
    x = 198,368,489,780.16/440,312.80
  6. Step 6: Final answer
    x = 450,517.20

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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.