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Finding the Fourth Proportional to 1,251.61, 1,727.08 and 692.05

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Solution

The fourth proportional to 1,251.61, 1,727.08 and 692.05 is: 954.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.61 : 1,727.08 = 692.05 : x
  2. Step 2: Convert to fraction form
    1,251.61/1,727.08 = 692.05/x
  3. Step 3: Cross multiply
    1,251.61x = 1,727.08 × 692.05
  4. Step 4: Simplify right side
    1,251.61x = 1,195,219.67
  5. Step 5: Solve for x
    x = 1,195,219.67/1,251.61
  6. Step 6: Final answer
    x = 954.95

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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.