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Finding the Fourth Proportional to 399,791.70, 551,711.61 and 227,709.63

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Solution

The fourth proportional to 399,791.70, 551,711.61 and 227,709.63 is: 314,238.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,791.70 : 551,711.61 = 227,709.63 : x
  2. Step 2: Convert to fraction form
    399,791.70/551,711.61 = 227,709.63/x
  3. Step 3: Cross multiply
    399,791.70x = 551,711.61 × 227,709.63
  4. Step 4: Simplify right side
    399,791.70x = 125,630,046,579.80
  5. Step 5: Solve for x
    x = 125,630,046,579.80/399,791.70
  6. Step 6: Final answer
    x = 314,238.76

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1.5x scale

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.