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Finding the Fourth Proportional to 399,269.92, 550,968.88 and 217,945.76

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Solution

The fourth proportional to 399,269.92, 550,968.88 and 217,945.76 is: 300,752.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,269.92 : 550,968.88 = 217,945.76 : x
  2. Step 2: Convert to fraction form
    399,269.92/550,968.88 = 217,945.76/x
  3. Step 3: Cross multiply
    399,269.92x = 550,968.88 × 217,945.76
  4. Step 4: Simplify right side
    399,269.92x = 120,081,331,287.95
  5. Step 5: Solve for x
    x = 120,081,331,287.95/399,269.92
  6. Step 6: Final answer
    x = 300,752.26

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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.