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Finding the Fourth Proportional to 871,000.41, 1,306,500 and 272,012.90

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Solution

The fourth proportional to 871,000.41, 1,306,500 and 272,012.90 is: 408,019.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,000.41 : 1,306,500 = 272,012.90 : x
  2. Step 2: Convert to fraction form
    871,000.41/1,306,500 = 272,012.90/x
  3. Step 3: Cross multiply
    871,000.41x = 1,306,500 × 272,012.90
  4. Step 4: Simplify right side
    871,000.41x = 355,384,853,850
  5. Step 5: Solve for x
    x = 355,384,853,850/871,000.41
  6. Step 6: Final answer
    x = 408,019.16

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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.