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Finding the Fourth Proportional to 713,865.54, 985,134.45 and 391,576.38

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Solution

The fourth proportional to 713,865.54, 985,134.45 and 391,576.38 is: 540,375.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,865.54 : 985,134.45 = 391,576.38 : x
  2. Step 2: Convert to fraction form
    713,865.54/985,134.45 = 391,576.38/x
  3. Step 3: Cross multiply
    713,865.54x = 985,134.45 × 391,576.38
  4. Step 4: Simplify right side
    713,865.54x = 385,755,381,744.29
  5. Step 5: Solve for x
    x = 385,755,381,744.29/713,865.54
  6. Step 6: Final answer
    x = 540,375.41

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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.