Home / 439,022.78-658,394.02-139,433.28

Finding the Fourth Proportional to 439,022.78, 658,394.02 and 139,433.28

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Solution

The fourth proportional to 439,022.78, 658,394.02 and 139,433.28 is: 209,105.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,022.78 : 658,394.02 = 139,433.28 : x
  2. Step 2: Convert to fraction form
    439,022.78/658,394.02 = 139,433.28/x
  3. Step 3: Cross multiply
    439,022.78x = 658,394.02 × 139,433.28
  4. Step 4: Simplify right side
    439,022.78x = 91,802,037,392.40
  5. Step 5: Solve for x
    x = 91,802,037,392.40/439,022.78
  6. Step 6: Final answer
    x = 209,105.41

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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.