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Finding the Fourth Proportional to 399,394.30, 551,203.92 and 238,249.24

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Solution

The fourth proportional to 399,394.30, 551,203.92 and 238,249.24 is: 328,807.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,394.30 : 551,203.92 = 238,249.24 : x
  2. Step 2: Convert to fraction form
    399,394.30/551,203.92 = 238,249.24/x
  3. Step 3: Cross multiply
    399,394.30x = 551,203.92 × 238,249.24
  4. Step 4: Simplify right side
    399,394.30x = 131,323,915,025.02
  5. Step 5: Solve for x
    x = 131,323,915,025.02/399,394.30
  6. Step 6: Final answer
    x = 328,807.68

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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.