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Finding the Fourth Proportional to 1,252, 1,727.76 and 692.47

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Solution

The fourth proportional to 1,252, 1,727.76 and 692.47 is: 955.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252 : 1,727.76 = 692.47 : x
  2. Step 2: Convert to fraction form
    1,252/1,727.76 = 692.47/x
  3. Step 3: Cross multiply
    1,252x = 1,727.76 × 692.47
  4. Step 4: Simplify right side
    1,252x = 1,196,421.97
  5. Step 5: Solve for x
    x = 1,196,421.97/1,252
  6. Step 6: Final answer
    x = 955.61

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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.