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Finding the Fourth Proportional to 399,927.52, 551,900.28 and 218,636.56

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Solution

The fourth proportional to 399,927.52, 551,900.28 and 218,636.56 is: 301,718.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,927.52 : 551,900.28 = 218,636.56 : x
  2. Step 2: Convert to fraction form
    399,927.52/551,900.28 = 218,636.56/x
  3. Step 3: Cross multiply
    399,927.52x = 551,900.28 × 218,636.56
  4. Step 4: Simplify right side
    399,927.52x = 120,665,578,682.24
  5. Step 5: Solve for x
    x = 120,665,578,682.24/399,927.52
  6. Step 6: Final answer
    x = 301,718.62

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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.