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Finding the Fourth Proportional to 787.29, 1,180.94 and 239.48

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Solution

The fourth proportional to 787.29, 1,180.94 and 239.48 is: 359.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.29 : 1,180.94 = 239.48 : x
  2. Step 2: Convert to fraction form
    787.29/1,180.94 = 239.48/x
  3. Step 3: Cross multiply
    787.29x = 1,180.94 × 239.48
  4. Step 4: Simplify right side
    787.29x = 282,811.51
  5. Step 5: Solve for x
    x = 282,811.51/787.29
  6. Step 6: Final answer
    x = 359.22

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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.