Home / 2,174.60-3,001.38-1,428.68

Finding the Fourth Proportional to 2,174.60, 3,001.38 and 1,428.68

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Solution

The fourth proportional to 2,174.60, 3,001.38 and 1,428.68 is: 1,971.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.60 : 3,001.38 = 1,428.68 : x
  2. Step 2: Convert to fraction form
    2,174.60/3,001.38 = 1,428.68/x
  3. Step 3: Cross multiply
    2,174.60x = 3,001.38 × 1,428.68
  4. Step 4: Simplify right side
    2,174.60x = 4,288,011.58
  5. Step 5: Solve for x
    x = 4,288,011.58/2,174.60
  6. Step 6: Final answer
    x = 1,971.86

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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.