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Finding the Fourth Proportional to 734, 1,100.77 and 426.45

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Solution

The fourth proportional to 734, 1,100.77 and 426.45 is: 639.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    734 : 1,100.77 = 426.45 : x
  2. Step 2: Convert to fraction form
    734/1,100.77 = 426.45/x
  3. Step 3: Cross multiply
    734x = 1,100.77 × 426.45
  4. Step 4: Simplify right side
    734x = 469,423.37
  5. Step 5: Solve for x
    x = 469,423.37/734
  6. Step 6: Final answer
    x = 639.54

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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.