Home / 5,228.46-7,215.30-2,990.43

Finding the Fourth Proportional to 5,228.46, 7,215.30 and 2,990.43

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Solution

The fourth proportional to 5,228.46, 7,215.30 and 2,990.43 is: 4,126.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,228.46 : 7,215.30 = 2,990.43 : x
  2. Step 2: Convert to fraction form
    5,228.46/7,215.30 = 2,990.43/x
  3. Step 3: Cross multiply
    5,228.46x = 7,215.30 × 2,990.43
  4. Step 4: Simplify right side
    5,228.46x = 21,576,798.55
  5. Step 5: Solve for x
    x = 21,576,798.55/5,228.46
  6. Step 6: Final answer
    x = 4,126.80

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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.