Home / 2,990.30-4,126.55-1,663.92

Finding the Fourth Proportional to 2,990.30, 4,126.55 and 1,663.92

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Solution

The fourth proportional to 2,990.30, 4,126.55 and 1,663.92 is: 2,296.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.30 : 4,126.55 = 1,663.92 : x
  2. Step 2: Convert to fraction form
    2,990.30/4,126.55 = 1,663.92/x
  3. Step 3: Cross multiply
    2,990.30x = 4,126.55 × 1,663.92
  4. Step 4: Simplify right side
    2,990.30x = 6,866,240.76
  5. Step 5: Solve for x
    x = 6,866,240.76/2,990.30
  6. Step 6: Final answer
    x = 2,296.18

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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.