Home / 2,605.28-3,906.74-1,123.80

Finding the Fourth Proportional to 2,605.28, 3,906.74 and 1,123.80

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Solution

The fourth proportional to 2,605.28, 3,906.74 and 1,123.80 is: 1,685.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,605.28 : 3,906.74 = 1,123.80 : x
  2. Step 2: Convert to fraction form
    2,605.28/3,906.74 = 1,123.80/x
  3. Step 3: Cross multiply
    2,605.28x = 3,906.74 × 1,123.80
  4. Step 4: Simplify right side
    2,605.28x = 4,390,388.79
  5. Step 5: Solve for x
    x = 4,390,388.79/2,605.28
  6. Step 6: Final answer
    x = 1,685.19

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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.