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Finding the Fourth Proportional to 1,366.87, 1,886.43 and 777.58

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Solution

The fourth proportional to 1,366.87, 1,886.43 and 777.58 is: 1,073.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.87 : 1,886.43 = 777.58 : x
  2. Step 2: Convert to fraction form
    1,366.87/1,886.43 = 777.58/x
  3. Step 3: Cross multiply
    1,366.87x = 1,886.43 × 777.58
  4. Step 4: Simplify right side
    1,366.87x = 1,466,850.24
  5. Step 5: Solve for x
    x = 1,466,850.24/1,366.87
  6. Step 6: Final answer
    x = 1,073.15

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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.