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Finding the Fourth Proportional to 759.51, 1,138.93 and 239.49

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Solution

The fourth proportional to 759.51, 1,138.93 and 239.49 is: 359.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.51 : 1,138.93 = 239.49 : x
  2. Step 2: Convert to fraction form
    759.51/1,138.93 = 239.49/x
  3. Step 3: Cross multiply
    759.51x = 1,138.93 × 239.49
  4. Step 4: Simplify right side
    759.51x = 272,761.75
  5. Step 5: Solve for x
    x = 272,761.75/759.51
  6. Step 6: Final answer
    x = 359.13

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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.