Home / 1,927.78-2,868.62-1,921.30

Finding the Fourth Proportional to 1,927.78, 2,868.62 and 1,921.30

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Solution

The fourth proportional to 1,927.78, 2,868.62 and 1,921.30 is: 2,858.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,927.78 : 2,868.62 = 1,921.30 : x
  2. Step 2: Convert to fraction form
    1,927.78/2,868.62 = 1,921.30/x
  3. Step 3: Cross multiply
    1,927.78x = 2,868.62 × 1,921.30
  4. Step 4: Simplify right side
    1,927.78x = 5,511,479.61
  5. Step 5: Solve for x
    x = 5,511,479.61/1,927.78
  6. Step 6: Final answer
    x = 2,858.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.