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Finding the Fourth Proportional to 755.02, 1,125.93 and 727.68

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Solution

The fourth proportional to 755.02, 1,125.93 and 727.68 is: 1,085.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.02 : 1,125.93 = 727.68 : x
  2. Step 2: Convert to fraction form
    755.02/1,125.93 = 727.68/x
  3. Step 3: Cross multiply
    755.02x = 1,125.93 × 727.68
  4. Step 4: Simplify right side
    755.02x = 819,316.74
  5. Step 5: Solve for x
    x = 819,316.74/755.02
  6. Step 6: Final answer
    x = 1,085.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.