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Finding the Fourth Proportional to 1,103.70, 1,522.77 and 637.98

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Solution

The fourth proportional to 1,103.70, 1,522.77 and 637.98 is: 880.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,103.70 : 1,522.77 = 637.98 : x
  2. Step 2: Convert to fraction form
    1,103.70/1,522.77 = 637.98/x
  3. Step 3: Cross multiply
    1,103.70x = 1,522.77 × 637.98
  4. Step 4: Simplify right side
    1,103.70x = 971,496.80
  5. Step 5: Solve for x
    x = 971,496.80/1,103.70
  6. Step 6: Final answer
    x = 880.22

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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.