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Finding the Fourth Proportional to 379,469.80, 569,031.90 and 168,999.40

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Solution

The fourth proportional to 379,469.80, 569,031.90 and 168,999.40 is: 253,422.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,469.80 : 569,031.90 = 168,999.40 : x
  2. Step 2: Convert to fraction form
    379,469.80/569,031.90 = 168,999.40/x
  3. Step 3: Cross multiply
    379,469.80x = 569,031.90 × 168,999.40
  4. Step 4: Simplify right side
    379,469.80x = 96,166,049,680.86
  5. Step 5: Solve for x
    x = 96,166,049,680.86/379,469.80
  6. Step 6: Final answer
    x = 253,422.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.