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Finding the Fourth Proportional to 787.76, 1,181.64 and 301.04

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Solution

The fourth proportional to 787.76, 1,181.64 and 301.04 is: 451.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.76 : 1,181.64 = 301.04 : x
  2. Step 2: Convert to fraction form
    787.76/1,181.64 = 301.04/x
  3. Step 3: Cross multiply
    787.76x = 1,181.64 × 301.04
  4. Step 4: Simplify right side
    787.76x = 355,720.91
  5. Step 5: Solve for x
    x = 355,720.91/787.76
  6. Step 6: Final answer
    x = 451.56

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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.