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Finding the Fourth Proportional to 487,512.09, 731,359.67 and 221,291.33

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Solution

The fourth proportional to 487,512.09, 731,359.67 and 221,291.33 is: 331,978.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,512.09 : 731,359.67 = 221,291.33 : x
  2. Step 2: Convert to fraction form
    487,512.09/731,359.67 = 221,291.33/x
  3. Step 3: Cross multiply
    487,512.09x = 731,359.67 × 221,291.33
  4. Step 4: Simplify right side
    487,512.09x = 161,843,549,319.41
  5. Step 5: Solve for x
    x = 161,843,549,319.41/487,512.09
  6. Step 6: Final answer
    x = 331,978.53

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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.