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Finding the Fourth Proportional to 787.44, 1,180.17 and 440.67

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Solution

The fourth proportional to 787.44, 1,180.17 and 440.67 is: 660.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.44 : 1,180.17 = 440.67 : x
  2. Step 2: Convert to fraction form
    787.44/1,180.17 = 440.67/x
  3. Step 3: Cross multiply
    787.44x = 1,180.17 × 440.67
  4. Step 4: Simplify right side
    787.44x = 520,065.51
  5. Step 5: Solve for x
    x = 520,065.51/787.44
  6. Step 6: Final answer
    x = 660.45

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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.