Home / 1,787.52-2,665.68-1,689.60

Finding the Fourth Proportional to 1,787.52, 2,665.68 and 1,689.60

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Solution

The fourth proportional to 1,787.52, 2,665.68 and 1,689.60 is: 2,519.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.52 : 2,665.68 = 1,689.60 : x
  2. Step 2: Convert to fraction form
    1,787.52/2,665.68 = 1,689.60/x
  3. Step 3: Cross multiply
    1,787.52x = 2,665.68 × 1,689.60
  4. Step 4: Simplify right side
    1,787.52x = 4,503,932.93
  5. Step 5: Solve for x
    x = 4,503,932.93/1,787.52
  6. Step 6: Final answer
    x = 2,519.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.