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Finding the Fourth Proportional to 399,143, 550,818.06 and 220,295

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Solution

The fourth proportional to 399,143, 550,818.06 and 220,295 is: 304,007.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,143 : 550,818.06 = 220,295 : x
  2. Step 2: Convert to fraction form
    399,143/550,818.06 = 220,295/x
  3. Step 3: Cross multiply
    399,143x = 550,818.06 × 220,295
  4. Step 4: Simplify right side
    399,143x = 121,342,464,527.70
  5. Step 5: Solve for x
    x = 121,342,464,527.70/399,143
  6. Step 6: Final answer
    x = 304,007.50

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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.