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Finding the Fourth Proportional to 959.78, 1,324.29 and 540.09

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Solution

The fourth proportional to 959.78, 1,324.29 and 540.09 is: 745.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.78 : 1,324.29 = 540.09 : x
  2. Step 2: Convert to fraction form
    959.78/1,324.29 = 540.09/x
  3. Step 3: Cross multiply
    959.78x = 1,324.29 × 540.09
  4. Step 4: Simplify right side
    959.78x = 715,237.81
  5. Step 5: Solve for x
    x = 715,237.81/959.78
  6. Step 6: Final answer
    x = 745.21

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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.