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Finding the Fourth Proportional to 439,912.80, 607,079.56 and 238,708.80

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Solution

The fourth proportional to 439,912.80, 607,079.56 and 238,708.80 is: 329,418.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,912.80 : 607,079.56 = 238,708.80 : x
  2. Step 2: Convert to fraction form
    439,912.80/607,079.56 = 238,708.80/x
  3. Step 3: Cross multiply
    439,912.80x = 607,079.56 × 238,708.80
  4. Step 4: Simplify right side
    439,912.80x = 144,915,233,272.13
  5. Step 5: Solve for x
    x = 144,915,233,272.13/439,912.80
  6. Step 6: Final answer
    x = 329,418.09

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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.