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Finding the Fourth Proportional to 443,394.30, 665,157.86 and 143,775.30

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Solution

The fourth proportional to 443,394.30, 665,157.86 and 143,775.30 is: 215,684.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,394.30 : 665,157.86 = 143,775.30 : x
  2. Step 2: Convert to fraction form
    443,394.30/665,157.86 = 143,775.30/x
  3. Step 3: Cross multiply
    443,394.30x = 665,157.86 × 143,775.30
  4. Step 4: Simplify right side
    443,394.30x = 95,633,270,868.86
  5. Step 5: Solve for x
    x = 95,633,270,868.86/443,394.30
  6. Step 6: Final answer
    x = 215,684.48

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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.