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Finding the Fourth Proportional to 442,881.80, 664,419.90 and 143,311.40

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Solution

The fourth proportional to 442,881.80, 664,419.90 and 143,311.40 is: 214,998.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,881.80 : 664,419.90 = 143,311.40 : x
  2. Step 2: Convert to fraction form
    442,881.80/664,419.90 = 143,311.40/x
  3. Step 3: Cross multiply
    442,881.80x = 664,419.90 × 143,311.40
  4. Step 4: Simplify right side
    442,881.80x = 95,218,946,056.86
  5. Step 5: Solve for x
    x = 95,218,946,056.86/442,881.80
  6. Step 6: Final answer
    x = 214,998.55

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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.