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Finding the Fourth Proportional to 735.09, 1,100.47 and 643.97

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Solution

The fourth proportional to 735.09, 1,100.47 and 643.97 is: 964.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.09 : 1,100.47 = 643.97 : x
  2. Step 2: Convert to fraction form
    735.09/1,100.47 = 643.97/x
  3. Step 3: Cross multiply
    735.09x = 1,100.47 × 643.97
  4. Step 4: Simplify right side
    735.09x = 708,664.16
  5. Step 5: Solve for x
    x = 708,664.16/735.09
  6. Step 6: Final answer
    x = 964.05

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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.