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Finding the Fourth Proportional to 1,366.23, 1,885.36 and 806.76

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Solution

The fourth proportional to 1,366.23, 1,885.36 and 806.76 is: 1,113.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.23 : 1,885.36 = 806.76 : x
  2. Step 2: Convert to fraction form
    1,366.23/1,885.36 = 806.76/x
  3. Step 3: Cross multiply
    1,366.23x = 1,885.36 × 806.76
  4. Step 4: Simplify right side
    1,366.23x = 1,521,019.57
  5. Step 5: Solve for x
    x = 1,521,019.57/1,366.23
  6. Step 6: Final answer
    x = 1,113.30

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Half scale
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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.