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Finding the Fourth Proportional to 399,857.52, 551,803.31 and 218,570.16

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Solution

The fourth proportional to 399,857.52, 551,803.31 and 218,570.16 is: 301,626.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,857.52 : 551,803.31 = 218,570.16 : x
  2. Step 2: Convert to fraction form
    399,857.52/551,803.31 = 218,570.16/x
  3. Step 3: Cross multiply
    399,857.52x = 551,803.31 × 218,570.16
  4. Step 4: Simplify right side
    399,857.52x = 120,607,736,662.38
  5. Step 5: Solve for x
    x = 120,607,736,662.38/399,857.52
  6. Step 6: Final answer
    x = 301,626.78

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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.