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Finding the Fourth Proportional to 1,252.19, 1,728.07 and 692.62

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Solution

The fourth proportional to 1,252.19, 1,728.07 and 692.62 is: 955.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252.19 : 1,728.07 = 692.62 : x
  2. Step 2: Convert to fraction form
    1,252.19/1,728.07 = 692.62/x
  3. Step 3: Cross multiply
    1,252.19x = 1,728.07 × 692.62
  4. Step 4: Simplify right side
    1,252.19x = 1,196,889.79
  5. Step 5: Solve for x
    x = 1,196,889.79/1,252.19
  6. Step 6: Final answer
    x = 955.84

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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.