Home / 5,077.20-7,615.80-2,485.20

Finding the Fourth Proportional to 5,077.20, 7,615.80 and 2,485.20

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Solution

The fourth proportional to 5,077.20, 7,615.80 and 2,485.20 is: 3,727.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,077.20 : 7,615.80 = 2,485.20 : x
  2. Step 2: Convert to fraction form
    5,077.20/7,615.80 = 2,485.20/x
  3. Step 3: Cross multiply
    5,077.20x = 7,615.80 × 2,485.20
  4. Step 4: Simplify right side
    5,077.20x = 18,926,786.16
  5. Step 5: Solve for x
    x = 18,926,786.16/5,077.20
  6. Step 6: Final answer
    x = 3,727.80

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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.