Home / 2,990.12-4,126.44-1,663.79

Finding the Fourth Proportional to 2,990.12, 4,126.44 and 1,663.79

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Solution

The fourth proportional to 2,990.12, 4,126.44 and 1,663.79 is: 2,296.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.12 : 4,126.44 = 1,663.79 : x
  2. Step 2: Convert to fraction form
    2,990.12/4,126.44 = 1,663.79/x
  3. Step 3: Cross multiply
    2,990.12x = 4,126.44 × 1,663.79
  4. Step 4: Simplify right side
    2,990.12x = 6,865,538.43
  5. Step 5: Solve for x
    x = 6,865,538.43/2,990.12
  6. Step 6: Final answer
    x = 2,296.08

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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.