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Finding the Fourth Proportional to 3,671.68, 5,064.68 and 2,178.60

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Solution

The fourth proportional to 3,671.68, 5,064.68 and 2,178.60 is: 3,005.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,671.68 : 5,064.68 = 2,178.60 : x
  2. Step 2: Convert to fraction form
    3,671.68/5,064.68 = 2,178.60/x
  3. Step 3: Cross multiply
    3,671.68x = 5,064.68 × 2,178.60
  4. Step 4: Simplify right side
    3,671.68x = 11,033,911.85
  5. Step 5: Solve for x
    x = 11,033,911.85/3,671.68
  6. Step 6: Final answer
    x = 3,005.14

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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.