Home / 438,809.22-658,138.56-139,223.04

Finding the Fourth Proportional to 438,809.22, 658,138.56 and 139,223.04

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Solution

The fourth proportional to 438,809.22, 658,138.56 and 139,223.04 is: 208,810.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,809.22 : 658,138.56 = 139,223.04 : x
  2. Step 2: Convert to fraction form
    438,809.22/658,138.56 = 139,223.04/x
  3. Step 3: Cross multiply
    438,809.22x = 658,138.56 × 139,223.04
  4. Step 4: Simplify right side
    438,809.22x = 91,628,051,064.42
  5. Step 5: Solve for x
    x = 91,628,051,064.42/438,809.22
  6. Step 6: Final answer
    x = 208,810.68

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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.