Home / 4,187.80-5,780.20-2,420.48

Finding the Fourth Proportional to 4,187.80, 5,780.20 and 2,420.48

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Solution

The fourth proportional to 4,187.80, 5,780.20 and 2,420.48 is: 3,340.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,187.80 : 5,780.20 = 2,420.48 : x
  2. Step 2: Convert to fraction form
    4,187.80/5,780.20 = 2,420.48/x
  3. Step 3: Cross multiply
    4,187.80x = 5,780.20 × 2,420.48
  4. Step 4: Simplify right side
    4,187.80x = 13,990,858.50
  5. Step 5: Solve for x
    x = 13,990,858.50/4,187.80
  6. Step 6: Final answer
    x = 3,340.86

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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.