Home / 2,431.04-3,645.80-787.21

Finding the Fourth Proportional to 2,431.04, 3,645.80 and 787.21

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Solution

The fourth proportional to 2,431.04, 3,645.80 and 787.21 is: 1,180.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,431.04 : 3,645.80 = 787.21 : x
  2. Step 2: Convert to fraction form
    2,431.04/3,645.80 = 787.21/x
  3. Step 3: Cross multiply
    2,431.04x = 3,645.80 × 787.21
  4. Step 4: Simplify right side
    2,431.04x = 2,869,988.05
  5. Step 5: Solve for x
    x = 2,869,988.05/2,431.04
  6. Step 6: Final answer
    x = 1,180.56

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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.