Home / 2,972.60-4,102.70-2,190.68

Finding the Fourth Proportional to 2,972.60, 4,102.70 and 2,190.68

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Solution

The fourth proportional to 2,972.60, 4,102.70 and 2,190.68 is: 3,023.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,972.60 : 4,102.70 = 2,190.68 : x
  2. Step 2: Convert to fraction form
    2,972.60/4,102.70 = 2,190.68/x
  3. Step 3: Cross multiply
    2,972.60x = 4,102.70 × 2,190.68
  4. Step 4: Simplify right side
    2,972.60x = 8,987,702.84
  5. Step 5: Solve for x
    x = 8,987,702.84/2,972.60
  6. Step 6: Final answer
    x = 3,023.52

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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.