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Finding the Fourth Proportional to 943.40, 1,301.91 and 550.28

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Solution

The fourth proportional to 943.40, 1,301.91 and 550.28 is: 759.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.40 : 1,301.91 = 550.28 : x
  2. Step 2: Convert to fraction form
    943.40/1,301.91 = 550.28/x
  3. Step 3: Cross multiply
    943.40x = 1,301.91 × 550.28
  4. Step 4: Simplify right side
    943.40x = 716,415.03
  5. Step 5: Solve for x
    x = 716,415.03/943.40
  6. Step 6: Final answer
    x = 759.40

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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.