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Finding the Fourth Proportional to 1,427.79, 2,141.28 and 550.23

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Solution

The fourth proportional to 1,427.79, 2,141.28 and 550.23 is: 825.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.79 : 2,141.28 = 550.23 : x
  2. Step 2: Convert to fraction form
    1,427.79/2,141.28 = 550.23/x
  3. Step 3: Cross multiply
    1,427.79x = 2,141.28 × 550.23
  4. Step 4: Simplify right side
    1,427.79x = 1,178,188.46
  5. Step 5: Solve for x
    x = 1,178,188.46/1,427.79
  6. Step 6: Final answer
    x = 825.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.