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Finding the Fourth Proportional to 1,252.29, 1,728.01 and 692.69

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Solution

The fourth proportional to 1,252.29, 1,728.01 and 692.69 is: 955.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252.29 : 1,728.01 = 692.69 : x
  2. Step 2: Convert to fraction form
    1,252.29/1,728.01 = 692.69/x
  3. Step 3: Cross multiply
    1,252.29x = 1,728.01 × 692.69
  4. Step 4: Simplify right side
    1,252.29x = 1,196,975.25
  5. Step 5: Solve for x
    x = 1,196,975.25/1,252.29
  6. Step 6: Final answer
    x = 955.83

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1.5x scale

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.