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Finding the Fourth Proportional to 443,685.60, 665,139.60 and 266,263.20

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Solution

The fourth proportional to 443,685.60, 665,139.60 and 266,263.20 is: 399,161.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,685.60 : 665,139.60 = 266,263.20 : x
  2. Step 2: Convert to fraction form
    443,685.60/665,139.60 = 266,263.20/x
  3. Step 3: Cross multiply
    443,685.60x = 665,139.60 × 266,263.20
  4. Step 4: Simplify right side
    443,685.60x = 177,102,198,342.72
  5. Step 5: Solve for x
    x = 177,102,198,342.72/443,685.60
  6. Step 6: Final answer
    x = 399,161.47

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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.