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Finding the Fourth Proportional to 1,366.20, 1,885.01 and 827.55

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Solution

The fourth proportional to 1,366.20, 1,885.01 and 827.55 is: 1,141.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.20 : 1,885.01 = 827.55 : x
  2. Step 2: Convert to fraction form
    1,366.20/1,885.01 = 827.55/x
  3. Step 3: Cross multiply
    1,366.20x = 1,885.01 × 827.55
  4. Step 4: Simplify right side
    1,366.20x = 1,559,935.89
  5. Step 5: Solve for x
    x = 1,559,935.89/1,366.20
  6. Step 6: Final answer
    x = 1,141.81

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Double scale
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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.