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Finding the Fourth Proportional to 2,179.68, 3,008.20 and 1,471.20

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Solution

The fourth proportional to 2,179.68, 3,008.20 and 1,471.20 is: 2,030.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.68 : 3,008.20 = 1,471.20 : x
  2. Step 2: Convert to fraction form
    2,179.68/3,008.20 = 1,471.20/x
  3. Step 3: Cross multiply
    2,179.68x = 3,008.20 × 1,471.20
  4. Step 4: Simplify right side
    2,179.68x = 4,425,663.84
  5. Step 5: Solve for x
    x = 4,425,663.84/2,179.68
  6. Step 6: Final answer
    x = 2,030.42

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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.