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Finding the Fourth Proportional to 734.15, 1,101.86 and 387.74

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Solution

The fourth proportional to 734.15, 1,101.86 and 387.74 is: 581.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.15 : 1,101.86 = 387.74 : x
  2. Step 2: Convert to fraction form
    734.15/1,101.86 = 387.74/x
  3. Step 3: Cross multiply
    734.15x = 1,101.86 × 387.74
  4. Step 4: Simplify right side
    734.15x = 427,227.75
  5. Step 5: Solve for x
    x = 427,227.75/734.15
  6. Step 6: Final answer
    x = 581.93

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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.