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Finding the Fourth Proportional to 734.21, 1,101.51 and 387.83

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Solution

The fourth proportional to 734.21, 1,101.51 and 387.83 is: 581.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.21 : 1,101.51 = 387.83 : x
  2. Step 2: Convert to fraction form
    734.21/1,101.51 = 387.83/x
  3. Step 3: Cross multiply
    734.21x = 1,101.51 × 387.83
  4. Step 4: Simplify right side
    734.21x = 427,201.38
  5. Step 5: Solve for x
    x = 427,201.38/734.21
  6. Step 6: Final answer
    x = 581.86

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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.