Home / 1,282.20-1,920.60-704.40

Finding the Fourth Proportional to 1,282.20, 1,920.60 and 704.40

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Solution

The fourth proportional to 1,282.20, 1,920.60 and 704.40 is: 1,055.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.20 : 1,920.60 = 704.40 : x
  2. Step 2: Convert to fraction form
    1,282.20/1,920.60 = 704.40/x
  3. Step 3: Cross multiply
    1,282.20x = 1,920.60 × 704.40
  4. Step 4: Simplify right side
    1,282.20x = 1,352,870.64
  5. Step 5: Solve for x
    x = 1,352,870.64/1,282.20
  6. Step 6: Final answer
    x = 1,055.12

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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.