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Finding the Fourth Proportional to 1,226.74, 1,692.85 and 695.63

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Solution

The fourth proportional to 1,226.74, 1,692.85 and 695.63 is: 959.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.74 : 1,692.85 = 695.63 : x
  2. Step 2: Convert to fraction form
    1,226.74/1,692.85 = 695.63/x
  3. Step 3: Cross multiply
    1,226.74x = 1,692.85 × 695.63
  4. Step 4: Simplify right side
    1,226.74x = 1,177,597.25
  5. Step 5: Solve for x
    x = 1,177,597.25/1,226.74
  6. Step 6: Final answer
    x = 959.94

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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.