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Finding the Fourth Proportional to 736.80, 1,105.50 and 371.50

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Solution

The fourth proportional to 736.80, 1,105.50 and 371.50 is: 557.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.80 : 1,105.50 = 371.50 : x
  2. Step 2: Convert to fraction form
    736.80/1,105.50 = 371.50/x
  3. Step 3: Cross multiply
    736.80x = 1,105.50 × 371.50
  4. Step 4: Simplify right side
    736.80x = 410,693.25
  5. Step 5: Solve for x
    x = 410,693.25/736.80
  6. Step 6: Final answer
    x = 557.40

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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.