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Finding the Fourth Proportional to 399,391.38, 551,231.30 and 236,041.22

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Solution

The fourth proportional to 399,391.38, 551,231.30 and 236,041.22 is: 325,778.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,391.38 : 551,231.30 = 236,041.22 : x
  2. Step 2: Convert to fraction form
    399,391.38/551,231.30 = 236,041.22/x
  3. Step 3: Cross multiply
    399,391.38x = 551,231.30 × 236,041.22
  4. Step 4: Simplify right side
    399,391.38x = 130,113,308,554.19
  5. Step 5: Solve for x
    x = 130,113,308,554.19/399,391.38
  6. Step 6: Final answer
    x = 325,778.96

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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.