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Finding the Fourth Proportional to 439,883.78, 607,039.20 and 238,679.78

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Solution

The fourth proportional to 439,883.78, 607,039.20 and 238,679.78 is: 329,377.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,883.78 : 607,039.20 = 238,679.78 : x
  2. Step 2: Convert to fraction form
    439,883.78/607,039.20 = 238,679.78/x
  3. Step 3: Cross multiply
    439,883.78x = 607,039.20 × 238,679.78
  4. Step 4: Simplify right side
    439,883.78x = 144,887,982,707.38
  5. Step 5: Solve for x
    x = 144,887,982,707.38/439,883.78
  6. Step 6: Final answer
    x = 329,377.87

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1.5x scale

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.