Home / 5,220.57-7,831.31-1,324.98

Finding the Fourth Proportional to 5,220.57, 7,831.31 and 1,324.98

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Solution

The fourth proportional to 5,220.57, 7,831.31 and 1,324.98 is: 1,987.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,220.57 : 7,831.31 = 1,324.98 : x
  2. Step 2: Convert to fraction form
    5,220.57/7,831.31 = 1,324.98/x
  3. Step 3: Cross multiply
    5,220.57x = 7,831.31 × 1,324.98
  4. Step 4: Simplify right side
    5,220.57x = 10,376,289.97
  5. Step 5: Solve for x
    x = 10,376,289.97/5,220.57
  6. Step 6: Final answer
    x = 1,987.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.