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Finding the Fourth Proportional to 1,882.79, 2,824.72 and 787.17

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Solution

The fourth proportional to 1,882.79, 2,824.72 and 787.17 is: 1,180.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,882.79 : 2,824.72 = 787.17 : x
  2. Step 2: Convert to fraction form
    1,882.79/2,824.72 = 787.17/x
  3. Step 3: Cross multiply
    1,882.79x = 2,824.72 × 787.17
  4. Step 4: Simplify right side
    1,882.79x = 2,223,532.01
  5. Step 5: Solve for x
    x = 2,223,532.01/1,882.79
  6. Step 6: Final answer
    x = 1,180.97

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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.