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Finding the Fourth Proportional to 3,987.56, 5,981.58 and 1,679.24

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Solution

The fourth proportional to 3,987.56, 5,981.58 and 1,679.24 is: 2,518.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.56 : 5,981.58 = 1,679.24 : x
  2. Step 2: Convert to fraction form
    3,987.56/5,981.58 = 1,679.24/x
  3. Step 3: Cross multiply
    3,987.56x = 5,981.58 × 1,679.24
  4. Step 4: Simplify right side
    3,987.56x = 10,044,508.40
  5. Step 5: Solve for x
    x = 10,044,508.40/3,987.56
  6. Step 6: Final answer
    x = 2,518.96

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1.5x scale

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.