Home / 2,990.20-4,126.42-1,663.88

Finding the Fourth Proportional to 2,990.20, 4,126.42 and 1,663.88

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Solution

The fourth proportional to 2,990.20, 4,126.42 and 1,663.88 is: 2,296.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.20 : 4,126.42 = 1,663.88 : x
  2. Step 2: Convert to fraction form
    2,990.20/4,126.42 = 1,663.88/x
  3. Step 3: Cross multiply
    2,990.20x = 4,126.42 × 1,663.88
  4. Step 4: Simplify right side
    2,990.20x = 6,865,867.71
  5. Step 5: Solve for x
    x = 6,865,867.71/2,990.20
  6. Step 6: Final answer
    x = 2,296.12

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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.