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Finding the Fourth Proportional to 3,168.34, 4,372.50 and 1,989.82

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Solution

The fourth proportional to 3,168.34, 4,372.50 and 1,989.82 is: 2,746.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,168.34 : 4,372.50 = 1,989.82 : x
  2. Step 2: Convert to fraction form
    3,168.34/4,372.50 = 1,989.82/x
  3. Step 3: Cross multiply
    3,168.34x = 4,372.50 × 1,989.82
  4. Step 4: Simplify right side
    3,168.34x = 8,700,487.95
  5. Step 5: Solve for x
    x = 8,700,487.95/3,168.34
  6. Step 6: Final answer
    x = 2,746.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.