Home / 3,121.95-4,681.38-1,660.71

Finding the Fourth Proportional to 3,121.95, 4,681.38 and 1,660.71

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Solution

The fourth proportional to 3,121.95, 4,681.38 and 1,660.71 is: 2,490.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.95 : 4,681.38 = 1,660.71 : x
  2. Step 2: Convert to fraction form
    3,121.95/4,681.38 = 1,660.71/x
  3. Step 3: Cross multiply
    3,121.95x = 4,681.38 × 1,660.71
  4. Step 4: Simplify right side
    3,121.95x = 7,774,414.58
  5. Step 5: Solve for x
    x = 7,774,414.58/3,121.95
  6. Step 6: Final answer
    x = 2,490.24

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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.