Home / 1,787.20-2,465.12-1,087.68

Finding the Fourth Proportional to 1,787.20, 2,465.12 and 1,087.68

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Solution

The fourth proportional to 1,787.20, 2,465.12 and 1,087.68 is: 1,500.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.20 : 2,465.12 = 1,087.68 : x
  2. Step 2: Convert to fraction form
    1,787.20/2,465.12 = 1,087.68/x
  3. Step 3: Cross multiply
    1,787.20x = 2,465.12 × 1,087.68
  4. Step 4: Simplify right side
    1,787.20x = 2,681,261.72
  5. Step 5: Solve for x
    x = 2,681,261.72/1,787.20
  6. Step 6: Final answer
    x = 1,500.26

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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.