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Finding the Fourth Proportional to 1,366.92, 1,886.35 and 777.44

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Solution

The fourth proportional to 1,366.92, 1,886.35 and 777.44 is: 1,072.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.92 : 1,886.35 = 777.44 : x
  2. Step 2: Convert to fraction form
    1,366.92/1,886.35 = 777.44/x
  3. Step 3: Cross multiply
    1,366.92x = 1,886.35 × 777.44
  4. Step 4: Simplify right side
    1,366.92x = 1,466,523.94
  5. Step 5: Solve for x
    x = 1,466,523.94/1,366.92
  6. Step 6: Final answer
    x = 1,072.87

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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.