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Finding the Fourth Proportional to 3,750.99, 5,175.48 and 2,178.78

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Solution

The fourth proportional to 3,750.99, 5,175.48 and 2,178.78 is: 3,006.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,750.99 : 5,175.48 = 2,178.78 : x
  2. Step 2: Convert to fraction form
    3,750.99/5,175.48 = 2,178.78/x
  3. Step 3: Cross multiply
    3,750.99x = 5,175.48 × 2,178.78
  4. Step 4: Simplify right side
    3,750.99x = 11,276,232.31
  5. Step 5: Solve for x
    x = 11,276,232.31/3,750.99
  6. Step 6: Final answer
    x = 3,006.20

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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.