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Finding the Fourth Proportional to 736.52, 1,105.10 and 639.12

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Solution

The fourth proportional to 736.52, 1,105.10 and 639.12 is: 958.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.52 : 1,105.10 = 639.12 : x
  2. Step 2: Convert to fraction form
    736.52/1,105.10 = 639.12/x
  3. Step 3: Cross multiply
    736.52x = 1,105.10 × 639.12
  4. Step 4: Simplify right side
    736.52x = 706,291.51
  5. Step 5: Solve for x
    x = 706,291.51/736.52
  6. Step 6: Final answer
    x = 958.96

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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.