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Finding the Fourth Proportional to 443,377.80, 665,163.90 and 143,807.40

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Solution

The fourth proportional to 443,377.80, 665,163.90 and 143,807.40 is: 215,742.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,377.80 : 665,163.90 = 143,807.40 : x
  2. Step 2: Convert to fraction form
    443,377.80/665,163.90 = 143,807.40/x
  3. Step 3: Cross multiply
    443,377.80x = 665,163.90 × 143,807.40
  4. Step 4: Simplify right side
    443,377.80x = 95,655,491,032.86
  5. Step 5: Solve for x
    x = 95,655,491,032.86/443,377.80
  6. Step 6: Final answer
    x = 215,742.63

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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.