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Finding the Fourth Proportional to 1,101.16, 1,519.54 and 635.40

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Solution

The fourth proportional to 1,101.16, 1,519.54 and 635.40 is: 876.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.16 : 1,519.54 = 635.40 : x
  2. Step 2: Convert to fraction form
    1,101.16/1,519.54 = 635.40/x
  3. Step 3: Cross multiply
    1,101.16x = 1,519.54 × 635.40
  4. Step 4: Simplify right side
    1,101.16x = 965,515.72
  5. Step 5: Solve for x
    x = 965,515.72/1,101.16
  6. Step 6: Final answer
    x = 876.82

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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.