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Finding the Fourth Proportional to 421,007.90, 580,963.02 and 239,738.36

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Solution

The fourth proportional to 421,007.90, 580,963.02 and 239,738.36 is: 330,823.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,007.90 : 580,963.02 = 239,738.36 : x
  2. Step 2: Convert to fraction form
    421,007.90/580,963.02 = 239,738.36/x
  3. Step 3: Cross multiply
    421,007.90x = 580,963.02 × 239,738.36
  4. Step 4: Simplify right side
    421,007.90x = 139,279,121,635.45
  5. Step 5: Solve for x
    x = 139,279,121,635.45/421,007.90
  6. Step 6: Final answer
    x = 330,823.06

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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.