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Finding the Fourth Proportional to 399,728.21, 551,656.35 and 227,653.43

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Solution

The fourth proportional to 399,728.21, 551,656.35 and 227,653.43 is: 314,179.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,728.21 : 551,656.35 = 227,653.43 : x
  2. Step 2: Convert to fraction form
    399,728.21/551,656.35 = 227,653.43/x
  3. Step 3: Cross multiply
    399,728.21x = 551,656.35 × 227,653.43
  4. Step 4: Simplify right side
    399,728.21x = 125,586,457,500.50
  5. Step 5: Solve for x
    x = 125,586,457,500.50/399,728.21
  6. Step 6: Final answer
    x = 314,179.62

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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.