Home / 3,215.38-4,439.30-2,878.69

Finding the Fourth Proportional to 3,215.38, 4,439.30 and 2,878.69

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Solution

The fourth proportional to 3,215.38, 4,439.30 and 2,878.69 is: 3,974.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215.38 : 4,439.30 = 2,878.69 : x
  2. Step 2: Convert to fraction form
    3,215.38/4,439.30 = 2,878.69/x
  3. Step 3: Cross multiply
    3,215.38x = 4,439.30 × 2,878.69
  4. Step 4: Simplify right side
    3,215.38x = 12,779,368.52
  5. Step 5: Solve for x
    x = 12,779,368.52/3,215.38
  6. Step 6: Final answer
    x = 3,974.45

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.