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Finding the Fourth Proportional to 1,192.34, 1,646.28 and 772.94

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Solution

The fourth proportional to 1,192.34, 1,646.28 and 772.94 is: 1,067.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,192.34 : 1,646.28 = 772.94 : x
  2. Step 2: Convert to fraction form
    1,192.34/1,646.28 = 772.94/x
  3. Step 3: Cross multiply
    1,192.34x = 1,646.28 × 772.94
  4. Step 4: Simplify right side
    1,192.34x = 1,272,475.66
  5. Step 5: Solve for x
    x = 1,272,475.66/1,192.34
  6. Step 6: Final answer
    x = 1,067.21

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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.