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Finding the Fourth Proportional to 316,624.14, 436,921.29 and 173,385.90

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Solution

The fourth proportional to 316,624.14, 436,921.29 and 173,385.90 is: 239,261.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,624.14 : 436,921.29 = 173,385.90 : x
  2. Step 2: Convert to fraction form
    316,624.14/436,921.29 = 173,385.90/x
  3. Step 3: Cross multiply
    316,624.14x = 436,921.29 × 173,385.90
  4. Step 4: Simplify right side
    316,624.14x = 75,755,991,095.81
  5. Step 5: Solve for x
    x = 75,755,991,095.81/316,624.14
  6. Step 6: Final answer
    x = 239,261.58

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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.