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Finding the Fourth Proportional to 316,523.90, 436,808.19 and 173,281.58

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Solution

The fourth proportional to 316,523.90, 436,808.19 and 173,281.58 is: 239,131.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,523.90 : 436,808.19 = 173,281.58 : x
  2. Step 2: Convert to fraction form
    316,523.90/436,808.19 = 173,281.58/x
  3. Step 3: Cross multiply
    316,523.90x = 436,808.19 × 173,281.58
  4. Step 4: Simplify right side
    316,523.90x = 75,690,813,320.14
  5. Step 5: Solve for x
    x = 75,690,813,320.14/316,523.90
  6. Step 6: Final answer
    x = 239,131.43

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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.