Home / 1,381.09-2,069.20-1,298.87

Finding the Fourth Proportional to 1,381.09, 2,069.20 and 1,298.87

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Solution

The fourth proportional to 1,381.09, 2,069.20 and 1,298.87 is: 1,946.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.09 : 2,069.20 = 1,298.87 : x
  2. Step 2: Convert to fraction form
    1,381.09/2,069.20 = 1,298.87/x
  3. Step 3: Cross multiply
    1,381.09x = 2,069.20 × 1,298.87
  4. Step 4: Simplify right side
    1,381.09x = 2,687,621.80
  5. Step 5: Solve for x
    x = 2,687,621.80/1,381.09
  6. Step 6: Final answer
    x = 1,946.01

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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.