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Finding the Fourth Proportional to 399,066.89, 550,724.47 and 227,009.79

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Solution

The fourth proportional to 399,066.89, 550,724.47 and 227,009.79 is: 313,280.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,066.89 : 550,724.47 = 227,009.79 : x
  2. Step 2: Convert to fraction form
    399,066.89/550,724.47 = 227,009.79/x
  3. Step 3: Cross multiply
    399,066.89x = 550,724.47 × 227,009.79
  4. Step 4: Simplify right side
    399,066.89x = 125,019,845,715.04
  5. Step 5: Solve for x
    x = 125,019,845,715.04/399,066.89
  6. Step 6: Final answer
    x = 313,280.43

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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.