Home / 1,869.87-2,581.40-1,275.49

Finding the Fourth Proportional to 1,869.87, 2,581.40 and 1,275.49

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Solution

The fourth proportional to 1,869.87, 2,581.40 and 1,275.49 is: 1,760.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.87 : 2,581.40 = 1,275.49 : x
  2. Step 2: Convert to fraction form
    1,869.87/2,581.40 = 1,275.49/x
  3. Step 3: Cross multiply
    1,869.87x = 2,581.40 × 1,275.49
  4. Step 4: Simplify right side
    1,869.87x = 3,292,549.89
  5. Step 5: Solve for x
    x = 3,292,549.89/1,869.87
  6. Step 6: Final answer
    x = 1,760.84

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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.