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Finding the Fourth Proportional to 1,107.03, 1,660.95 and 522.21

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Solution

The fourth proportional to 1,107.03, 1,660.95 and 522.21 is: 783.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.03 : 1,660.95 = 522.21 : x
  2. Step 2: Convert to fraction form
    1,107.03/1,660.95 = 522.21/x
  3. Step 3: Cross multiply
    1,107.03x = 1,660.95 × 522.21
  4. Step 4: Simplify right side
    1,107.03x = 867,364.70
  5. Step 5: Solve for x
    x = 867,364.70/1,107.03
  6. Step 6: Final answer
    x = 783.51

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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.