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Finding the Fourth Proportional to 265,470.47, 397,995.20 and 139,086.47

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Solution

The fourth proportional to 265,470.47, 397,995.20 and 139,086.47 is: 208,519.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,470.47 : 397,995.20 = 139,086.47 : x
  2. Step 2: Convert to fraction form
    265,470.47/397,995.20 = 139,086.47/x
  3. Step 3: Cross multiply
    265,470.47x = 397,995.20 × 139,086.47
  4. Step 4: Simplify right side
    265,470.47x = 55,355,747,744.50
  5. Step 5: Solve for x
    x = 55,355,747,744.50/265,470.47
  6. Step 6: Final answer
    x = 208,519.42

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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.