Home / 438,825.20-658,260.57-139,329.21

Finding the Fourth Proportional to 438,825.20, 658,260.57 and 139,329.21

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Solution

The fourth proportional to 438,825.20, 658,260.57 and 139,329.21 is: 209,001.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,825.20 : 658,260.57 = 139,329.21 : x
  2. Step 2: Convert to fraction form
    438,825.20/658,260.57 = 139,329.21/x
  3. Step 3: Cross multiply
    438,825.20x = 658,260.57 × 139,329.21
  4. Step 4: Simplify right side
    438,825.20x = 91,714,928,183.21
  5. Step 5: Solve for x
    x = 91,714,928,183.21/438,825.20
  6. Step 6: Final answer
    x = 209,001.05

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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.