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Finding the Fourth Proportional to 1,103.52, 1,522.08 and 772.48

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Solution

The fourth proportional to 1,103.52, 1,522.08 and 772.48 is: 1,065.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,103.52 : 1,522.08 = 772.48 : x
  2. Step 2: Convert to fraction form
    1,103.52/1,522.08 = 772.48/x
  3. Step 3: Cross multiply
    1,103.52x = 1,522.08 × 772.48
  4. Step 4: Simplify right side
    1,103.52x = 1,175,776.36
  5. Step 5: Solve for x
    x = 1,175,776.36/1,103.52
  6. Step 6: Final answer
    x = 1,065.48

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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.