Home / 2,381.55-3,286.35-1,386.87

Finding the Fourth Proportional to 2,381.55, 3,286.35 and 1,386.87

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Solution

The fourth proportional to 2,381.55, 3,286.35 and 1,386.87 is: 1,913.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,381.55 : 3,286.35 = 1,386.87 : x
  2. Step 2: Convert to fraction form
    2,381.55/3,286.35 = 1,386.87/x
  3. Step 3: Cross multiply
    2,381.55x = 3,286.35 × 1,386.87
  4. Step 4: Simplify right side
    2,381.55x = 4,557,740.22
  5. Step 5: Solve for x
    x = 4,557,740.22/2,381.55
  6. Step 6: Final answer
    x = 1,913.77

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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.