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Finding the Fourth Proportional to 1,100.10, 1,518 and 634.38

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Solution

The fourth proportional to 1,100.10, 1,518 and 634.38 is: 875.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.10 : 1,518 = 634.38 : x
  2. Step 2: Convert to fraction form
    1,100.10/1,518 = 634.38/x
  3. Step 3: Cross multiply
    1,100.10x = 1,518 × 634.38
  4. Step 4: Simplify right side
    1,100.10x = 962,988.84
  5. Step 5: Solve for x
    x = 962,988.84/1,100.10
  6. Step 6: Final answer
    x = 875.36

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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.