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Finding the Fourth Proportional to 443,350.45, 665,189.70 and 143,840.80

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Solution

The fourth proportional to 443,350.45, 665,189.70 and 143,840.80 is: 215,814.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,350.45 : 665,189.70 = 143,840.80 : x
  2. Step 2: Convert to fraction form
    443,350.45/665,189.70 = 143,840.80/x
  3. Step 3: Cross multiply
    443,350.45x = 665,189.70 × 143,840.80
  4. Step 4: Simplify right side
    443,350.45x = 95,681,418,599.76
  5. Step 5: Solve for x
    x = 95,681,418,599.76/443,350.45
  6. Step 6: Final answer
    x = 215,814.42

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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.