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Finding the Fourth Proportional to 1,069.82, 1,473.39 and 922.40

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Solution

The fourth proportional to 1,069.82, 1,473.39 and 922.40 is: 1,270.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.82 : 1,473.39 = 922.40 : x
  2. Step 2: Convert to fraction form
    1,069.82/1,473.39 = 922.40/x
  3. Step 3: Cross multiply
    1,069.82x = 1,473.39 × 922.40
  4. Step 4: Simplify right side
    1,069.82x = 1,359,047.57
  5. Step 5: Solve for x
    x = 1,359,047.57/1,069.82
  6. Step 6: Final answer
    x = 1,270.36

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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.