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Finding the Fourth Proportional to 1,193.36, 1,646.74 and 662.20

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Solution

The fourth proportional to 1,193.36, 1,646.74 and 662.20 is: 913.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.36 : 1,646.74 = 662.20 : x
  2. Step 2: Convert to fraction form
    1,193.36/1,646.74 = 662.20/x
  3. Step 3: Cross multiply
    1,193.36x = 1,646.74 × 662.20
  4. Step 4: Simplify right side
    1,193.36x = 1,090,471.23
  5. Step 5: Solve for x
    x = 1,090,471.23/1,193.36
  6. Step 6: Final answer
    x = 913.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.