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Finding the Fourth Proportional to 399,231.69, 550,952.08 and 217,955.36

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Solution

The fourth proportional to 399,231.69, 550,952.08 and 217,955.36 is: 300,785.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,231.69 : 550,952.08 = 217,955.36 : x
  2. Step 2: Convert to fraction form
    399,231.69/550,952.08 = 217,955.36/x
  3. Step 3: Cross multiply
    399,231.69x = 550,952.08 × 217,955.36
  4. Step 4: Simplify right side
    399,231.69x = 120,082,956,672.54
  5. Step 5: Solve for x
    x = 120,082,956,672.54/399,231.69
  6. Step 6: Final answer
    x = 300,785.14

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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.