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Finding the Fourth Proportional to 1,107.72, 1,527.06 and 910.92

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Solution

The fourth proportional to 1,107.72, 1,527.06 and 910.92 is: 1,255.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.72 : 1,527.06 = 910.92 : x
  2. Step 2: Convert to fraction form
    1,107.72/1,527.06 = 910.92/x
  3. Step 3: Cross multiply
    1,107.72x = 1,527.06 × 910.92
  4. Step 4: Simplify right side
    1,107.72x = 1,391,029.50
  5. Step 5: Solve for x
    x = 1,391,029.50/1,107.72
  6. Step 6: Final answer
    x = 1,255.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.