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Finding the Fourth Proportional to 755.51, 1,132.45 and 293.15

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Solution

The fourth proportional to 755.51, 1,132.45 and 293.15 is: 439.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.51 : 1,132.45 = 293.15 : x
  2. Step 2: Convert to fraction form
    755.51/1,132.45 = 293.15/x
  3. Step 3: Cross multiply
    755.51x = 1,132.45 × 293.15
  4. Step 4: Simplify right side
    755.51x = 331,976.25
  5. Step 5: Solve for x
    x = 331,976.25/755.51
  6. Step 6: Final answer
    x = 439.41

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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.