Home / 1,320.80-1,982.40-888.26

Finding the Fourth Proportional to 1,320.80, 1,982.40 and 888.26

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Solution

The fourth proportional to 1,320.80, 1,982.40 and 888.26 is: 1,333.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.80 : 1,982.40 = 888.26 : x
  2. Step 2: Convert to fraction form
    1,320.80/1,982.40 = 888.26/x
  3. Step 3: Cross multiply
    1,320.80x = 1,982.40 × 888.26
  4. Step 4: Simplify right side
    1,320.80x = 1,760,886.62
  5. Step 5: Solve for x
    x = 1,760,886.62/1,320.80
  6. Step 6: Final answer
    x = 1,333.20

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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.