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Finding the Fourth Proportional to 399,092.88, 550,743.28 and 217,807.84

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Solution

The fourth proportional to 399,092.88, 550,743.28 and 217,807.84 is: 300,572.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,092.88 : 550,743.28 = 217,807.84 : x
  2. Step 2: Convert to fraction form
    399,092.88/550,743.28 = 217,807.84/x
  3. Step 3: Cross multiply
    399,092.88x = 550,743.28 × 217,807.84
  4. Step 4: Simplify right side
    399,092.88x = 119,956,204,211.32
  5. Step 5: Solve for x
    x = 119,956,204,211.32/399,092.88
  6. Step 6: Final answer
    x = 300,572.15

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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.