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Finding the Fourth Proportional to 399,048.88, 550,699.18 and 217,772.52

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Solution

The fourth proportional to 399,048.88, 550,699.18 and 217,772.52 is: 300,532.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,048.88 : 550,699.18 = 217,772.52 : x
  2. Step 2: Convert to fraction form
    399,048.88/550,699.18 = 217,772.52/x
  3. Step 3: Cross multiply
    399,048.88x = 550,699.18 × 217,772.52
  4. Step 4: Simplify right side
    399,048.88x = 119,927,148,190.53
  5. Step 5: Solve for x
    x = 119,927,148,190.53/399,048.88
  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.