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Finding the Fourth Proportional to 399,077.15, 550,738.13 and 217,800.71

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Solution

The fourth proportional to 399,077.15, 550,738.13 and 217,800.71 is: 300,571.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,077.15 : 550,738.13 = 217,800.71 : x
  2. Step 2: Convert to fraction form
    399,077.15/550,738.13 = 217,800.71/x
  3. Step 3: Cross multiply
    399,077.15x = 550,738.13 × 217,800.71
  4. Step 4: Simplify right side
    399,077.15x = 119,951,153,960.65
  5. Step 5: Solve for x
    x = 119,951,153,960.65/399,077.15
  6. Step 6: Final answer
    x = 300,571.34

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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.