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Finding the Fourth Proportional to 399,590.94, 551,446.34 and 238,539.50

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Solution

The fourth proportional to 399,590.94, 551,446.34 and 238,539.50 is: 329,190.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,590.94 : 551,446.34 = 238,539.50 : x
  2. Step 2: Convert to fraction form
    399,590.94/551,446.34 = 238,539.50/x
  3. Step 3: Cross multiply
    399,590.94x = 551,446.34 × 238,539.50
  4. Step 4: Simplify right side
    399,590.94x = 131,541,736,195.40
  5. Step 5: Solve for x
    x = 131,541,736,195.40/399,590.94
  6. Step 6: Final answer
    x = 329,190.98

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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.