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Finding the Fourth Proportional to 787.02, 1,180.53 and 324.72

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Solution

The fourth proportional to 787.02, 1,180.53 and 324.72 is: 487.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.02 : 1,180.53 = 324.72 : x
  2. Step 2: Convert to fraction form
    787.02/1,180.53 = 324.72/x
  3. Step 3: Cross multiply
    787.02x = 1,180.53 × 324.72
  4. Step 4: Simplify right side
    787.02x = 383,341.70
  5. Step 5: Solve for x
    x = 383,341.70/787.02
  6. Step 6: Final answer
    x = 487.08

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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.