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Finding the Fourth Proportional to 1,366.39, 1,885.21 and 806.91

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Solution

The fourth proportional to 1,366.39, 1,885.21 and 806.91 is: 1,113.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.39 : 1,885.21 = 806.91 : x
  2. Step 2: Convert to fraction form
    1,366.39/1,885.21 = 806.91/x
  3. Step 3: Cross multiply
    1,366.39x = 1,885.21 × 806.91
  4. Step 4: Simplify right side
    1,366.39x = 1,521,194.80
  5. Step 5: Solve for x
    x = 1,521,194.80/1,366.39
  6. Step 6: Final answer
    x = 1,113.29

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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.