Home / 2,101.40-3,155.70-1,489.40

Finding the Fourth Proportional to 2,101.40, 3,155.70 and 1,489.40

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Solution

The fourth proportional to 2,101.40, 3,155.70 and 1,489.40 is: 2,236.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.40 : 3,155.70 = 1,489.40 : x
  2. Step 2: Convert to fraction form
    2,101.40/3,155.70 = 1,489.40/x
  3. Step 3: Cross multiply
    2,101.40x = 3,155.70 × 1,489.40
  4. Step 4: Simplify right side
    2,101.40x = 4,700,099.58
  5. Step 5: Solve for x
    x = 4,700,099.58/2,101.40
  6. Step 6: Final answer
    x = 2,236.65

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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.