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Finding the Fourth Proportional to 713,793.72, 985,063.68 and 391,515.60

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Solution

The fourth proportional to 713,793.72, 985,063.68 and 391,515.60 is: 540,307.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,793.72 : 985,063.68 = 391,515.60 : x
  2. Step 2: Convert to fraction form
    713,793.72/985,063.68 = 391,515.60/x
  3. Step 3: Cross multiply
    713,793.72x = 985,063.68 × 391,515.60
  4. Step 4: Simplify right side
    713,793.72x = 385,667,797,713.41
  5. Step 5: Solve for x
    x = 385,667,797,713.41/713,793.72
  6. Step 6: Final answer
    x = 540,307.08

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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.