Home / 2,174.20-3,000.66-1,428.77

Finding the Fourth Proportional to 2,174.20, 3,000.66 and 1,428.77

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Solution

The fourth proportional to 2,174.20, 3,000.66 and 1,428.77 is: 1,971.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.20 : 3,000.66 = 1,428.77 : x
  2. Step 2: Convert to fraction form
    2,174.20/3,000.66 = 1,428.77/x
  3. Step 3: Cross multiply
    2,174.20x = 3,000.66 × 1,428.77
  4. Step 4: Simplify right side
    2,174.20x = 4,287,252.99
  5. Step 5: Solve for x
    x = 4,287,252.99/2,174.20
  6. Step 6: Final answer
    x = 1,971.88

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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.