Home / 2,990.28-4,126.53-1,663.98

Finding the Fourth Proportional to 2,990.28, 4,126.53 and 1,663.98

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Solution

The fourth proportional to 2,990.28, 4,126.53 and 1,663.98 is: 2,296.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.28 : 4,126.53 = 1,663.98 : x
  2. Step 2: Convert to fraction form
    2,990.28/4,126.53 = 1,663.98/x
  3. Step 3: Cross multiply
    2,990.28x = 4,126.53 × 1,663.98
  4. Step 4: Simplify right side
    2,990.28x = 6,866,463.39
  5. Step 5: Solve for x
    x = 6,866,463.39/2,990.28
  6. Step 6: Final answer
    x = 2,296.26

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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.