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Finding the Fourth Proportional to 2,346.80, 3,520.80 and 787.04

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Solution

The fourth proportional to 2,346.80, 3,520.80 and 787.04 is: 1,180.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,346.80 : 3,520.80 = 787.04 : x
  2. Step 2: Convert to fraction form
    2,346.80/3,520.80 = 787.04/x
  3. Step 3: Cross multiply
    2,346.80x = 3,520.80 × 787.04
  4. Step 4: Simplify right side
    2,346.80x = 2,771,010.43
  5. Step 5: Solve for x
    x = 2,771,010.43/2,346.80
  6. Step 6: Final answer
    x = 1,180.76

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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.