Home / 2,878.28-4,319.88-1,320.64

Finding the Fourth Proportional to 2,878.28, 4,319.88 and 1,320.64

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Solution

The fourth proportional to 2,878.28, 4,319.88 and 1,320.64 is: 1,982.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.28 : 4,319.88 = 1,320.64 : x
  2. Step 2: Convert to fraction form
    2,878.28/4,319.88 = 1,320.64/x
  3. Step 3: Cross multiply
    2,878.28x = 4,319.88 × 1,320.64
  4. Step 4: Simplify right side
    2,878.28x = 5,705,006.32
  5. Step 5: Solve for x
    x = 5,705,006.32/2,878.28
  6. Step 6: Final answer
    x = 1,982.09

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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.