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Finding the Fourth Proportional to 734.34, 1,101.78 and 349.50

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Solution

The fourth proportional to 734.34, 1,101.78 and 349.50 is: 524.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.34 : 1,101.78 = 349.50 : x
  2. Step 2: Convert to fraction form
    734.34/1,101.78 = 349.50/x
  3. Step 3: Cross multiply
    734.34x = 1,101.78 × 349.50
  4. Step 4: Simplify right side
    734.34x = 385,072.11
  5. Step 5: Solve for x
    x = 385,072.11/734.34
  6. Step 6: Final answer
    x = 524.38

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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.