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Finding the Fourth Proportional to 220,487.76, 331,000.56 and 145,671.84

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Solution

The fourth proportional to 220,487.76, 331,000.56 and 145,671.84 is: 218,685.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,487.76 : 331,000.56 = 145,671.84 : x
  2. Step 2: Convert to fraction form
    220,487.76/331,000.56 = 145,671.84/x
  3. Step 3: Cross multiply
    220,487.76x = 331,000.56 × 145,671.84
  4. Step 4: Simplify right side
    220,487.76x = 48,217,460,616.23
  5. Step 5: Solve for x
    x = 48,217,460,616.23/220,487.76
  6. Step 6: Final answer
    x = 218,685.43

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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.