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Finding the Fourth Proportional to 736.02, 1,098.36 and 643.68

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Solution

The fourth proportional to 736.02, 1,098.36 and 643.68 is: 960.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.02 : 1,098.36 = 643.68 : x
  2. Step 2: Convert to fraction form
    736.02/1,098.36 = 643.68/x
  3. Step 3: Cross multiply
    736.02x = 1,098.36 × 643.68
  4. Step 4: Simplify right side
    736.02x = 706,992.36
  5. Step 5: Solve for x
    x = 706,992.36/736.02
  6. Step 6: Final answer
    x = 960.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.