Home / 1,920.40-2,878.60-1,304.14

Finding the Fourth Proportional to 1,920.40, 2,878.60 and 1,304.14

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Solution

The fourth proportional to 1,920.40, 2,878.60 and 1,304.14 is: 1,954.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.40 : 2,878.60 = 1,304.14 : x
  2. Step 2: Convert to fraction form
    1,920.40/2,878.60 = 1,304.14/x
  3. Step 3: Cross multiply
    1,920.40x = 2,878.60 × 1,304.14
  4. Step 4: Simplify right side
    1,920.40x = 3,754,097.40
  5. Step 5: Solve for x
    x = 3,754,097.40/1,920.40
  6. Step 6: Final answer
    x = 1,954.85

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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.