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Finding the Fourth Proportional to 1,252.88, 1,728.94 and 693.35

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Solution

The fourth proportional to 1,252.88, 1,728.94 and 693.35 is: 956.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252.88 : 1,728.94 = 693.35 : x
  2. Step 2: Convert to fraction form
    1,252.88/1,728.94 = 693.35/x
  3. Step 3: Cross multiply
    1,252.88x = 1,728.94 × 693.35
  4. Step 4: Simplify right side
    1,252.88x = 1,198,763.14
  5. Step 5: Solve for x
    x = 1,198,763.14/1,252.88
  6. Step 6: Final answer
    x = 956.80

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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.