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Finding the Fourth Proportional to 399,647.27, 551,506.74 and 218,355.32

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Solution

The fourth proportional to 399,647.27, 551,506.74 and 218,355.32 is: 301,326.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,647.27 : 551,506.74 = 218,355.32 : x
  2. Step 2: Convert to fraction form
    399,647.27/551,506.74 = 218,355.32/x
  3. Step 3: Cross multiply
    399,647.27x = 551,506.74 × 218,355.32
  4. Step 4: Simplify right side
    399,647.27x = 120,424,430,694.86
  5. Step 5: Solve for x
    x = 120,424,430,694.86/399,647.27
  6. Step 6: Final answer
    x = 301,326.79

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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.