Home / 2,689.56-4,028.85-1,298.70

Finding the Fourth Proportional to 2,689.56, 4,028.85 and 1,298.70

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Solution

The fourth proportional to 2,689.56, 4,028.85 and 1,298.70 is: 1,945.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.56 : 4,028.85 = 1,298.70 : x
  2. Step 2: Convert to fraction form
    2,689.56/4,028.85 = 1,298.70/x
  3. Step 3: Cross multiply
    2,689.56x = 4,028.85 × 1,298.70
  4. Step 4: Simplify right side
    2,689.56x = 5,232,267.50
  5. Step 5: Solve for x
    x = 5,232,267.50/2,689.56
  6. Step 6: Final answer
    x = 1,945.40

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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.