Home / 5,239.20-7,860.40-1,778.88

Finding the Fourth Proportional to 5,239.20, 7,860.40 and 1,778.88

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Solution

The fourth proportional to 5,239.20, 7,860.40 and 1,778.88 is: 2,668.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,239.20 : 7,860.40 = 1,778.88 : x
  2. Step 2: Convert to fraction form
    5,239.20/7,860.40 = 1,778.88/x
  3. Step 3: Cross multiply
    5,239.20x = 7,860.40 × 1,778.88
  4. Step 4: Simplify right side
    5,239.20x = 13,982,708.35
  5. Step 5: Solve for x
    x = 13,982,708.35/5,239.20
  6. Step 6: Final answer
    x = 2,668.86

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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.