Home / 2,860.20-3,947.70-1,681.95

Finding the Fourth Proportional to 2,860.20, 3,947.70 and 1,681.95

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Solution

The fourth proportional to 2,860.20, 3,947.70 and 1,681.95 is: 2,321.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,860.20 : 3,947.70 = 1,681.95 : x
  2. Step 2: Convert to fraction form
    2,860.20/3,947.70 = 1,681.95/x
  3. Step 3: Cross multiply
    2,860.20x = 3,947.70 × 1,681.95
  4. Step 4: Simplify right side
    2,860.20x = 6,639,834.02
  5. Step 5: Solve for x
    x = 6,639,834.02/2,860.20
  6. Step 6: Final answer
    x = 2,321.46

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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.