Home / 3,071.80-4,246.98-2,678.20

Finding the Fourth Proportional to 3,071.80, 4,246.98 and 2,678.20

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Solution

The fourth proportional to 3,071.80, 4,246.98 and 2,678.20 is: 3,702.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,071.80 : 4,246.98 = 2,678.20 : x
  2. Step 2: Convert to fraction form
    3,071.80/4,246.98 = 2,678.20/x
  3. Step 3: Cross multiply
    3,071.80x = 4,246.98 × 2,678.20
  4. Step 4: Simplify right side
    3,071.80x = 11,374,261.84
  5. Step 5: Solve for x
    x = 11,374,261.84/3,071.80
  6. Step 6: Final answer
    x = 3,702.80

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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.