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Finding the Fourth Proportional to 1,192.31, 1,645.40 and 726.56

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Solution

The fourth proportional to 1,192.31, 1,645.40 and 726.56 is: 1,002.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,192.31 : 1,645.40 = 726.56 : x
  2. Step 2: Convert to fraction form
    1,192.31/1,645.40 = 726.56/x
  3. Step 3: Cross multiply
    1,192.31x = 1,645.40 × 726.56
  4. Step 4: Simplify right side
    1,192.31x = 1,195,482.30
  5. Step 5: Solve for x
    x = 1,195,482.30/1,192.31
  6. Step 6: Final answer
    x = 1,002.66

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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.