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Finding the Fourth Proportional to 726.98, 1,005.81 and 699.98

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Solution

The fourth proportional to 726.98, 1,005.81 and 699.98 is: 968.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.98 : 1,005.81 = 699.98 : x
  2. Step 2: Convert to fraction form
    726.98/1,005.81 = 699.98/x
  3. Step 3: Cross multiply
    726.98x = 1,005.81 × 699.98
  4. Step 4: Simplify right side
    726.98x = 704,046.88
  5. Step 5: Solve for x
    x = 704,046.88/726.98
  6. Step 6: Final answer
    x = 968.45

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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.