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Finding the Fourth Proportional to 1,252.23, 1,726.23 and 985.81

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Solution

The fourth proportional to 1,252.23, 1,726.23 and 985.81 is: 1,358.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252.23 : 1,726.23 = 985.81 : x
  2. Step 2: Convert to fraction form
    1,252.23/1,726.23 = 985.81/x
  3. Step 3: Cross multiply
    1,252.23x = 1,726.23 × 985.81
  4. Step 4: Simplify right side
    1,252.23x = 1,701,736.95
  5. Step 5: Solve for x
    x = 1,701,736.95/1,252.23
  6. Step 6: Final answer
    x = 1,358.97

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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.