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Finding the Fourth Proportional to 440,007.20, 660,010.80 and 218,823.20

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Solution

The fourth proportional to 440,007.20, 660,010.80 and 218,823.20 is: 328,234.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,007.20 : 660,010.80 = 218,823.20 : x
  2. Step 2: Convert to fraction form
    440,007.20/660,010.80 = 218,823.20/x
  3. Step 3: Cross multiply
    440,007.20x = 660,010.80 × 218,823.20
  4. Step 4: Simplify right side
    440,007.20x = 144,425,675,290.56
  5. Step 5: Solve for x
    x = 144,425,675,290.56/440,007.20
  6. Step 6: Final answer
    x = 328,234.80

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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.