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Finding the Fourth Proportional to 399,590.57, 551,445.82 and 238,539.13

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Solution

The fourth proportional to 399,590.57, 551,445.82 and 238,539.13 is: 329,190.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,590.57 : 551,445.82 = 238,539.13 : x
  2. Step 2: Convert to fraction form
    399,590.57/551,445.82 = 238,539.13/x
  3. Step 3: Cross multiply
    399,590.57x = 551,445.82 × 238,539.13
  4. Step 4: Simplify right side
    399,590.57x = 131,541,405,511.76
  5. Step 5: Solve for x
    x = 131,541,405,511.76/399,590.57
  6. Step 6: Final answer
    x = 329,190.47

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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.