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Finding the Fourth Proportional to 1,103.54, 1,522.82 and 631.40

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Solution

The fourth proportional to 1,103.54, 1,522.82 and 631.40 is: 871.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,103.54 : 1,522.82 = 631.40 : x
  2. Step 2: Convert to fraction form
    1,103.54/1,522.82 = 631.40/x
  3. Step 3: Cross multiply
    1,103.54x = 1,522.82 × 631.40
  4. Step 4: Simplify right side
    1,103.54x = 961,502.51
  5. Step 5: Solve for x
    x = 961,502.51/1,103.54
  6. Step 6: Final answer
    x = 871.29

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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.