Home / 2,129.74-3,190.56-1,306.78

Finding the Fourth Proportional to 2,129.74, 3,190.56 and 1,306.78

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Solution

The fourth proportional to 2,129.74, 3,190.56 and 1,306.78 is: 1,957.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.74 : 3,190.56 = 1,306.78 : x
  2. Step 2: Convert to fraction form
    2,129.74/3,190.56 = 1,306.78/x
  3. Step 3: Cross multiply
    2,129.74x = 3,190.56 × 1,306.78
  4. Step 4: Simplify right side
    2,129.74x = 4,169,360.00
  5. Step 5: Solve for x
    x = 4,169,360.00/2,129.74
  6. Step 6: Final answer
    x = 1,957.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.