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Finding the Fourth Proportional to 353,072.58, 487,281 and 209,831.37

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Solution

The fourth proportional to 353,072.58, 487,281 and 209,831.37 is: 289,591.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,072.58 : 487,281 = 209,831.37 : x
  2. Step 2: Convert to fraction form
    353,072.58/487,281 = 209,831.37/x
  3. Step 3: Cross multiply
    353,072.58x = 487,281 × 209,831.37
  4. Step 4: Simplify right side
    353,072.58x = 102,246,839,804.97
  5. Step 5: Solve for x
    x = 102,246,839,804.97/353,072.58
  6. Step 6: Final answer
    x = 289,591.56

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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.