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Finding the Fourth Proportional to 3,888.80, 5,828.72 and 1,942.40

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Solution

The fourth proportional to 3,888.80, 5,828.72 and 1,942.40 is: 2,911.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.80 : 5,828.72 = 1,942.40 : x
  2. Step 2: Convert to fraction form
    3,888.80/5,828.72 = 1,942.40/x
  3. Step 3: Cross multiply
    3,888.80x = 5,828.72 × 1,942.40
  4. Step 4: Simplify right side
    3,888.80x = 11,321,705.73
  5. Step 5: Solve for x
    x = 11,321,705.73/3,888.80
  6. Step 6: Final answer
    x = 2,911.36

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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.