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Finding the Fourth Proportional to 2,671.80, 3,688.86 and 1,729.86

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Solution

The fourth proportional to 2,671.80, 3,688.86 and 1,729.86 is: 2,388.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,671.80 : 3,688.86 = 1,729.86 : x
  2. Step 2: Convert to fraction form
    2,671.80/3,688.86 = 1,729.86/x
  3. Step 3: Cross multiply
    2,671.80x = 3,688.86 × 1,729.86
  4. Step 4: Simplify right side
    2,671.80x = 6,381,211.36
  5. Step 5: Solve for x
    x = 6,381,211.36/2,671.80
  6. Step 6: Final answer
    x = 2,388.36

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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.