Home / 1,787.13-2,467.55-1,290.87

Finding the Fourth Proportional to 1,787.13, 2,467.55 and 1,290.87

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Solution

The fourth proportional to 1,787.13, 2,467.55 and 1,290.87 is: 1,782.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.13 : 2,467.55 = 1,290.87 : x
  2. Step 2: Convert to fraction form
    1,787.13/2,467.55 = 1,290.87/x
  3. Step 3: Cross multiply
    1,787.13x = 2,467.55 × 1,290.87
  4. Step 4: Simplify right side
    1,787.13x = 3,185,286.27
  5. Step 5: Solve for x
    x = 3,185,286.27/1,787.13
  6. Step 6: Final answer
    x = 1,782.35

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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.