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Finding the Fourth Proportional to 713,839.96, 985,091.34 and 391,548.88

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Solution

The fourth proportional to 713,839.96, 985,091.34 and 391,548.88 is: 540,333.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,839.96 : 985,091.34 = 391,548.88 : x
  2. Step 2: Convert to fraction form
    713,839.96/985,091.34 = 391,548.88/x
  3. Step 3: Cross multiply
    713,839.96x = 985,091.34 × 391,548.88
  4. Step 4: Simplify right side
    713,839.96x = 385,711,410,874.70
  5. Step 5: Solve for x
    x = 385,711,410,874.70/713,839.96
  6. Step 6: Final answer
    x = 540,333.17

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1.5x scale

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.