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Finding the Fourth Proportional to 399,039.35, 550,685.99 and 217,762.96

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Solution

The fourth proportional to 399,039.35, 550,685.99 and 217,762.96 is: 300,519.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,039.35 : 550,685.99 = 217,762.96 : x
  2. Step 2: Convert to fraction form
    399,039.35/550,685.99 = 217,762.96/x
  3. Step 3: Cross multiply
    399,039.35x = 550,685.99 × 217,762.96
  4. Step 4: Simplify right side
    399,039.35x = 119,919,011,212.93
  5. Step 5: Solve for x
    x = 119,919,011,212.93/399,039.35
  6. Step 6: Final answer
    x = 300,519.26

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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.