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Finding the Fourth Proportional to 3,928.31, 5,888.80 and 1,978.23

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Solution

The fourth proportional to 3,928.31, 5,888.80 and 1,978.23 is: 2,965.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.31 : 5,888.80 = 1,978.23 : x
  2. Step 2: Convert to fraction form
    3,928.31/5,888.80 = 1,978.23/x
  3. Step 3: Cross multiply
    3,928.31x = 5,888.80 × 1,978.23
  4. Step 4: Simplify right side
    3,928.31x = 11,649,400.82
  5. Step 5: Solve for x
    x = 11,649,400.82/3,928.31
  6. Step 6: Final answer
    x = 2,965.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.