Home / 2,520.40-3,780.60-1,937.20

Finding the Fourth Proportional to 2,520.40, 3,780.60 and 1,937.20

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Solution

The fourth proportional to 2,520.40, 3,780.60 and 1,937.20 is: 2,905.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,520.40 : 3,780.60 = 1,937.20 : x
  2. Step 2: Convert to fraction form
    2,520.40/3,780.60 = 1,937.20/x
  3. Step 3: Cross multiply
    2,520.40x = 3,780.60 × 1,937.20
  4. Step 4: Simplify right side
    2,520.40x = 7,323,778.32
  5. Step 5: Solve for x
    x = 7,323,778.32/2,520.40
  6. Step 6: Final answer
    x = 2,905.80

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1.5x scale

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.