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Finding the Fourth Proportional to 399,047.39, 550,697.10 and 217,771.03

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Solution

The fourth proportional to 399,047.39, 550,697.10 and 217,771.03 is: 300,530.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,047.39 : 550,697.10 = 217,771.03 : x
  2. Step 2: Convert to fraction form
    399,047.39/550,697.10 = 217,771.03/x
  3. Step 3: Cross multiply
    399,047.39x = 550,697.10 × 217,771.03
  4. Step 4: Simplify right side
    399,047.39x = 119,925,874,685.01
  5. Step 5: Solve for x
    x = 119,925,874,685.01/399,047.39
  6. Step 6: Final answer
    x = 300,530.41

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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.