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Finding the Fourth Proportional to 1,103.15, 1,521.83 and 637.13

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Solution

The fourth proportional to 1,103.15, 1,521.83 and 637.13 is: 878.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,103.15 : 1,521.83 = 637.13 : x
  2. Step 2: Convert to fraction form
    1,103.15/1,521.83 = 637.13/x
  3. Step 3: Cross multiply
    1,103.15x = 1,521.83 × 637.13
  4. Step 4: Simplify right side
    1,103.15x = 969,592.75
  5. Step 5: Solve for x
    x = 969,592.75/1,103.15
  6. Step 6: Final answer
    x = 878.94

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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.