Home / 3,186.90-4,780.35-2,085.30

Finding the Fourth Proportional to 3,186.90, 4,780.35 and 2,085.30

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Solution

The fourth proportional to 3,186.90, 4,780.35 and 2,085.30 is: 3,127.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,186.90 : 4,780.35 = 2,085.30 : x
  2. Step 2: Convert to fraction form
    3,186.90/4,780.35 = 2,085.30/x
  3. Step 3: Cross multiply
    3,186.90x = 4,780.35 × 2,085.30
  4. Step 4: Simplify right side
    3,186.90x = 9,968,463.86
  5. Step 5: Solve for x
    x = 9,968,463.86/3,186.90
  6. Step 6: Final answer
    x = 3,127.95

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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.