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Finding the Fourth Proportional to 3,781.50, 5,672.25 and 1,473

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Solution

The fourth proportional to 3,781.50, 5,672.25 and 1,473 is: 2,209.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.50 : 5,672.25 = 1,473 : x
  2. Step 2: Convert to fraction form
    3,781.50/5,672.25 = 1,473/x
  3. Step 3: Cross multiply
    3,781.50x = 5,672.25 × 1,473
  4. Step 4: Simplify right side
    3,781.50x = 8,355,224.25
  5. Step 5: Solve for x
    x = 8,355,224.25/3,781.50
  6. Step 6: Final answer
    x = 2,209.50

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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.