Home / 2,087.40-3,125.34-1,220.20

Finding the Fourth Proportional to 2,087.40, 3,125.34 and 1,220.20

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Solution

The fourth proportional to 2,087.40, 3,125.34 and 1,220.20 is: 1,826.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.40 : 3,125.34 = 1,220.20 : x
  2. Step 2: Convert to fraction form
    2,087.40/3,125.34 = 1,220.20/x
  3. Step 3: Cross multiply
    2,087.40x = 3,125.34 × 1,220.20
  4. Step 4: Simplify right side
    2,087.40x = 3,813,539.87
  5. Step 5: Solve for x
    x = 3,813,539.87/2,087.40
  6. Step 6: Final answer
    x = 1,826.93

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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.