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Finding the Fourth Proportional to 787.90, 1,181.86 and 240.08

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Solution

The fourth proportional to 787.90, 1,181.86 and 240.08 is: 360.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.90 : 1,181.86 = 240.08 : x
  2. Step 2: Convert to fraction form
    787.90/1,181.86 = 240.08/x
  3. Step 3: Cross multiply
    787.90x = 1,181.86 × 240.08
  4. Step 4: Simplify right side
    787.90x = 283,739.75
  5. Step 5: Solve for x
    x = 283,739.75/787.90
  6. Step 6: Final answer
    x = 360.12

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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.