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Finding the Fourth Proportional to 399,793.40, 551,333.21 and 261,766.36

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Solution

The fourth proportional to 399,793.40, 551,333.21 and 261,766.36 is: 360,987.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,793.40 : 551,333.21 = 261,766.36 : x
  2. Step 2: Convert to fraction form
    399,793.40/551,333.21 = 261,766.36/x
  3. Step 3: Cross multiply
    399,793.40x = 551,333.21 × 261,766.36
  4. Step 4: Simplify right side
    399,793.40x = 144,320,487,528.82
  5. Step 5: Solve for x
    x = 144,320,487,528.82/399,793.40
  6. Step 6: Final answer
    x = 360,987.67

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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.