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Finding the Fourth Proportional to 402,221.40, 603,672.30 and 165,733.80

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Solution

The fourth proportional to 402,221.40, 603,672.30 and 165,733.80 is: 248,740.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,221.40 : 603,672.30 = 165,733.80 : x
  2. Step 2: Convert to fraction form
    402,221.40/603,672.30 = 165,733.80/x
  3. Step 3: Cross multiply
    402,221.40x = 603,672.30 × 165,733.80
  4. Step 4: Simplify right side
    402,221.40x = 100,048,904,233.74
  5. Step 5: Solve for x
    x = 100,048,904,233.74/402,221.40
  6. Step 6: Final answer
    x = 248,740.88

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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.