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Finding the Fourth Proportional to 443,820.80, 665,342.40 and 266,139.20

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Solution

The fourth proportional to 443,820.80, 665,342.40 and 266,139.20 is: 398,975.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,820.80 : 665,342.40 = 266,139.20 : x
  2. Step 2: Convert to fraction form
    443,820.80/665,342.40 = 266,139.20/x
  3. Step 3: Cross multiply
    443,820.80x = 665,342.40 × 266,139.20
  4. Step 4: Simplify right side
    443,820.80x = 177,073,694,062.08
  5. Step 5: Solve for x
    x = 177,073,694,062.08/443,820.80
  6. Step 6: Final answer
    x = 398,975.65

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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.