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Finding the Fourth Proportional to 734.66, 1,100.91 and 405.66

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Solution

The fourth proportional to 734.66, 1,100.91 and 405.66 is: 607.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.66 : 1,100.91 = 405.66 : x
  2. Step 2: Convert to fraction form
    734.66/1,100.91 = 405.66/x
  3. Step 3: Cross multiply
    734.66x = 1,100.91 × 405.66
  4. Step 4: Simplify right side
    734.66x = 446,595.15
  5. Step 5: Solve for x
    x = 446,595.15/734.66
  6. Step 6: Final answer
    x = 607.90

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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.