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Finding the Fourth Proportional to 1,102.55, 1,521.55 and 605.21

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Solution

The fourth proportional to 1,102.55, 1,521.55 and 605.21 is: 835.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102.55 : 1,521.55 = 605.21 : x
  2. Step 2: Convert to fraction form
    1,102.55/1,521.55 = 605.21/x
  3. Step 3: Cross multiply
    1,102.55x = 1,521.55 × 605.21
  4. Step 4: Simplify right side
    1,102.55x = 920,857.28
  5. Step 5: Solve for x
    x = 920,857.28/1,102.55
  6. Step 6: Final answer
    x = 835.21

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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.