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Finding the Fourth Proportional to 1,193.38, 1,646.47 and 774.06

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Solution

The fourth proportional to 1,193.38, 1,646.47 and 774.06 is: 1,067.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.38 : 1,646.47 = 774.06 : x
  2. Step 2: Convert to fraction form
    1,193.38/1,646.47 = 774.06/x
  3. Step 3: Cross multiply
    1,193.38x = 1,646.47 × 774.06
  4. Step 4: Simplify right side
    1,193.38x = 1,274,454.47
  5. Step 5: Solve for x
    x = 1,274,454.47/1,193.38
  6. Step 6: Final answer
    x = 1,067.94

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Double scale
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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.