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Finding the Fourth Proportional to 734.82, 1,102.54 and 426.81

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Solution

The fourth proportional to 734.82, 1,102.54 and 426.81 is: 640.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.82 : 1,102.54 = 426.81 : x
  2. Step 2: Convert to fraction form
    734.82/1,102.54 = 426.81/x
  3. Step 3: Cross multiply
    734.82x = 1,102.54 × 426.81
  4. Step 4: Simplify right side
    734.82x = 470,575.10
  5. Step 5: Solve for x
    x = 470,575.10/734.82
  6. Step 6: Final answer
    x = 640.40

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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.