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Finding the Fourth Proportional to 1,102.94, 1,521.98 and 605.57

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Solution

The fourth proportional to 1,102.94, 1,521.98 and 605.57 is: 835.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102.94 : 1,521.98 = 605.57 : x
  2. Step 2: Convert to fraction form
    1,102.94/1,521.98 = 605.57/x
  3. Step 3: Cross multiply
    1,102.94x = 1,521.98 × 605.57
  4. Step 4: Simplify right side
    1,102.94x = 921,665.43
  5. Step 5: Solve for x
    x = 921,665.43/1,102.94
  6. Step 6: Final answer
    x = 835.64

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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.