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Finding the Fourth Proportional to 787.56, 1,180.88 and 300.36

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Solution

The fourth proportional to 787.56, 1,180.88 and 300.36 is: 450.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.56 : 1,180.88 = 300.36 : x
  2. Step 2: Convert to fraction form
    787.56/1,180.88 = 300.36/x
  3. Step 3: Cross multiply
    787.56x = 1,180.88 × 300.36
  4. Step 4: Simplify right side
    787.56x = 354,689.12
  5. Step 5: Solve for x
    x = 354,689.12/787.56
  6. Step 6: Final answer
    x = 450.36

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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.