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Finding the Fourth Proportional to 1,103.36, 1,522.52 and 631.28

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Solution

The fourth proportional to 1,103.36, 1,522.52 and 631.28 is: 871.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,103.36 : 1,522.52 = 631.28 : x
  2. Step 2: Convert to fraction form
    1,103.36/1,522.52 = 631.28/x
  3. Step 3: Cross multiply
    1,103.36x = 1,522.52 × 631.28
  4. Step 4: Simplify right side
    1,103.36x = 961,136.43
  5. Step 5: Solve for x
    x = 961,136.43/1,103.36
  6. Step 6: Final answer
    x = 871.10

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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.