Home / 5,228.83-7,215.81-2,990.80

Finding the Fourth Proportional to 5,228.83, 7,215.81 and 2,990.80

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Solution

The fourth proportional to 5,228.83, 7,215.81 and 2,990.80 is: 4,127.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,228.83 : 7,215.81 = 2,990.80 : x
  2. Step 2: Convert to fraction form
    5,228.83/7,215.81 = 2,990.80/x
  3. Step 3: Cross multiply
    5,228.83x = 7,215.81 × 2,990.80
  4. Step 4: Simplify right side
    5,228.83x = 21,581,044.55
  5. Step 5: Solve for x
    x = 21,581,044.55/5,228.83
  6. Step 6: Final answer
    x = 4,127.32

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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.