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Finding the Fourth Proportional to 399,394.27, 551,143.56 and 218,071.27

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Solution

The fourth proportional to 399,394.27, 551,143.56 and 218,071.27 is: 300,927.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,394.27 : 551,143.56 = 218,071.27 : x
  2. Step 2: Convert to fraction form
    399,394.27/551,143.56 = 218,071.27/x
  3. Step 3: Cross multiply
    399,394.27x = 551,143.56 × 218,071.27
  4. Step 4: Simplify right side
    399,394.27x = 120,188,576,081.52
  5. Step 5: Solve for x
    x = 120,188,576,081.52/399,394.27
  6. Step 6: Final answer
    x = 300,927.14

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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.