Home / 1,334.40-2,001.60-787.65

Finding the Fourth Proportional to 1,334.40, 2,001.60 and 787.65

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Solution

The fourth proportional to 1,334.40, 2,001.60 and 787.65 is: 1,181.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,334.40 : 2,001.60 = 787.65 : x
  2. Step 2: Convert to fraction form
    1,334.40/2,001.60 = 787.65/x
  3. Step 3: Cross multiply
    1,334.40x = 2,001.60 × 787.65
  4. Step 4: Simplify right side
    1,334.40x = 1,576,560.24
  5. Step 5: Solve for x
    x = 1,576,560.24/1,334.40
  6. Step 6: Final answer
    x = 1,181.48

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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.