Home / 2,865.60-3,954.76-1,686.90

Finding the Fourth Proportional to 2,865.60, 3,954.76 and 1,686.90

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Solution

The fourth proportional to 2,865.60, 3,954.76 and 1,686.90 is: 2,328.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,865.60 : 3,954.76 = 1,686.90 : x
  2. Step 2: Convert to fraction form
    2,865.60/3,954.76 = 1,686.90/x
  3. Step 3: Cross multiply
    2,865.60x = 3,954.76 × 1,686.90
  4. Step 4: Simplify right side
    2,865.60x = 6,671,280.43
  5. Step 5: Solve for x
    x = 6,671,280.43/2,865.60
  6. Step 6: Final answer
    x = 2,328.06

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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.