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Finding the Fourth Proportional to 727.76, 1,090.95 and 362.19

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Solution

The fourth proportional to 727.76, 1,090.95 and 362.19 is: 542.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.76 : 1,090.95 = 362.19 : x
  2. Step 2: Convert to fraction form
    727.76/1,090.95 = 362.19/x
  3. Step 3: Cross multiply
    727.76x = 1,090.95 × 362.19
  4. Step 4: Simplify right side
    727.76x = 395,131.18
  5. Step 5: Solve for x
    x = 395,131.18/727.76
  6. Step 6: Final answer
    x = 542.95

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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.