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Finding the Fourth Proportional to 913.80, 1,369.26 and 588.90

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Solution

The fourth proportional to 913.80, 1,369.26 and 588.90 is: 882.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.80 : 1,369.26 = 588.90 : x
  2. Step 2: Convert to fraction form
    913.80/1,369.26 = 588.90/x
  3. Step 3: Cross multiply
    913.80x = 1,369.26 × 588.90
  4. Step 4: Simplify right side
    913.80x = 806,357.21
  5. Step 5: Solve for x
    x = 806,357.21/913.80
  6. Step 6: Final answer
    x = 882.42

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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.