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Finding the Fourth Proportional to 1,367.14, 1,886.78 and 777.56

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Solution

The fourth proportional to 1,367.14, 1,886.78 and 777.56 is: 1,073.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,367.14 : 1,886.78 = 777.56 : x
  2. Step 2: Convert to fraction form
    1,367.14/1,886.78 = 777.56/x
  3. Step 3: Cross multiply
    1,367.14x = 1,886.78 × 777.56
  4. Step 4: Simplify right side
    1,367.14x = 1,467,084.66
  5. Step 5: Solve for x
    x = 1,467,084.66/1,367.14
  6. Step 6: Final answer
    x = 1,073.10

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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.