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Finding the Fourth Proportional to 399,304.35, 551,031.26 and 218,009.34

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Solution

The fourth proportional to 399,304.35, 551,031.26 and 218,009.34 is: 300,848.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,304.35 : 551,031.26 = 218,009.34 : x
  2. Step 2: Convert to fraction form
    399,304.35/551,031.26 = 218,009.34/x
  3. Step 3: Cross multiply
    399,304.35x = 551,031.26 × 218,009.34
  4. Step 4: Simplify right side
    399,304.35x = 120,129,960,221.92
  5. Step 5: Solve for x
    x = 120,129,960,221.92/399,304.35
  6. Step 6: Final answer
    x = 300,848.11

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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.