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Finding the Fourth Proportional to 1,107.19, 1,527.87 and 634.74

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Solution

The fourth proportional to 1,107.19, 1,527.87 and 634.74 is: 875.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.19 : 1,527.87 = 634.74 : x
  2. Step 2: Convert to fraction form
    1,107.19/1,527.87 = 634.74/x
  3. Step 3: Cross multiply
    1,107.19x = 1,527.87 × 634.74
  4. Step 4: Simplify right side
    1,107.19x = 969,801.88
  5. Step 5: Solve for x
    x = 969,801.88/1,107.19
  6. Step 6: Final answer
    x = 875.92

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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.