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Finding the Fourth Proportional to 443,342.61, 665,107.36 and 143,799.89

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Solution

The fourth proportional to 443,342.61, 665,107.36 and 143,799.89 is: 215,730.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,342.61 : 665,107.36 = 143,799.89 : x
  2. Step 2: Convert to fraction form
    443,342.61/665,107.36 = 143,799.89/x
  3. Step 3: Cross multiply
    443,342.61x = 665,107.36 × 143,799.89
  4. Step 4: Simplify right side
    443,342.61x = 95,642,361,521.15
  5. Step 5: Solve for x
    x = 95,642,361,521.15/443,342.61
  6. Step 6: Final answer
    x = 215,730.14

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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.