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Finding the Fourth Proportional to 3,981, 5,971.50 and 1,549

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Solution

The fourth proportional to 3,981, 5,971.50 and 1,549 is: 2,323.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981 : 5,971.50 = 1,549 : x
  2. Step 2: Convert to fraction form
    3,981/5,971.50 = 1,549/x
  3. Step 3: Cross multiply
    3,981x = 5,971.50 × 1,549
  4. Step 4: Simplify right side
    3,981x = 9,249,853.50
  5. Step 5: Solve for x
    x = 9,249,853.50/3,981
  6. Step 6: Final answer
    x = 2,323.50

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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.