Home / 1,787.10-2,681.20-800.75

Finding the Fourth Proportional to 1,787.10, 2,681.20 and 800.75

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Solution

The fourth proportional to 1,787.10, 2,681.20 and 800.75 is: 1,201.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.10 : 2,681.20 = 800.75 : x
  2. Step 2: Convert to fraction form
    1,787.10/2,681.20 = 800.75/x
  3. Step 3: Cross multiply
    1,787.10x = 2,681.20 × 800.75
  4. Step 4: Simplify right side
    1,787.10x = 2,146,957.49
  5. Step 5: Solve for x
    x = 2,146,957.49/1,787.10
  6. Step 6: Final answer
    x = 1,201.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.