Home / 2,382.90-3,288.49-1,388.01

Finding the Fourth Proportional to 2,382.90, 3,288.49 and 1,388.01

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Solution

The fourth proportional to 2,382.90, 3,288.49 and 1,388.01 is: 1,915.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,382.90 : 3,288.49 = 1,388.01 : x
  2. Step 2: Convert to fraction form
    2,382.90/3,288.49 = 1,388.01/x
  3. Step 3: Cross multiply
    2,382.90x = 3,288.49 × 1,388.01
  4. Step 4: Simplify right side
    2,382.90x = 4,564,465.87
  5. Step 5: Solve for x
    x = 4,564,465.87/2,382.90
  6. Step 6: Final answer
    x = 1,915.51

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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.