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Finding the Fourth Proportional to 316,780.30, 437,156.79 and 189,455.89

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Solution

The fourth proportional to 316,780.30, 437,156.79 and 189,455.89 is: 261,449.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,780.30 : 437,156.79 = 189,455.89 : x
  2. Step 2: Convert to fraction form
    316,780.30/437,156.79 = 189,455.89/x
  3. Step 3: Cross multiply
    316,780.30x = 437,156.79 × 189,455.89
  4. Step 4: Simplify right side
    316,780.30x = 82,821,928,718.99
  5. Step 5: Solve for x
    x = 82,821,928,718.99/316,780.30
  6. Step 6: Final answer
    x = 261,449.11

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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.