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Finding the Fourth Proportional to 399,048.89, 550,699.17 and 217,772.53

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Solution

The fourth proportional to 399,048.89, 550,699.17 and 217,772.53 is: 300,532.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,048.89 : 550,699.17 = 217,772.53 : x
  2. Step 2: Convert to fraction form
    399,048.89/550,699.17 = 217,772.53/x
  3. Step 3: Cross multiply
    399,048.89x = 550,699.17 × 217,772.53
  4. Step 4: Simplify right side
    399,048.89x = 119,927,151,519.80
  5. Step 5: Solve for x
    x = 119,927,151,519.80/399,048.89
  6. Step 6: Final answer
    x = 300,532.48

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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.