Home / 3,239.20-4,860.42-1,389.80

Finding the Fourth Proportional to 3,239.20, 4,860.42 and 1,389.80

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Solution

The fourth proportional to 3,239.20, 4,860.42 and 1,389.80 is: 2,085.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,239.20 : 4,860.42 = 1,389.80 : x
  2. Step 2: Convert to fraction form
    3,239.20/4,860.42 = 1,389.80/x
  3. Step 3: Cross multiply
    3,239.20x = 4,860.42 × 1,389.80
  4. Step 4: Simplify right side
    3,239.20x = 6,755,011.72
  5. Step 5: Solve for x
    x = 6,755,011.72/3,239.20
  6. Step 6: Final answer
    x = 2,085.40

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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.