Home / 4,071.78-5,619.15-2,279.20

Finding the Fourth Proportional to 4,071.78, 5,619.15 and 2,279.20

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Solution

The fourth proportional to 4,071.78, 5,619.15 and 2,279.20 is: 3,145.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,071.78 : 5,619.15 = 2,279.20 : x
  2. Step 2: Convert to fraction form
    4,071.78/5,619.15 = 2,279.20/x
  3. Step 3: Cross multiply
    4,071.78x = 5,619.15 × 2,279.20
  4. Step 4: Simplify right side
    4,071.78x = 12,807,166.68
  5. Step 5: Solve for x
    x = 12,807,166.68/4,071.78
  6. Step 6: Final answer
    x = 3,145.35

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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.