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Finding the Fourth Proportional to 391,611, 586,818.36 and 291,285.96

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Solution

The fourth proportional to 391,611, 586,818.36 and 291,285.96 is: 436,484.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,611 : 586,818.36 = 291,285.96 : x
  2. Step 2: Convert to fraction form
    391,611/586,818.36 = 291,285.96/x
  3. Step 3: Cross multiply
    391,611x = 586,818.36 × 291,285.96
  4. Step 4: Simplify right side
    391,611x = 170,931,949,338.23
  5. Step 5: Solve for x
    x = 170,931,949,338.23/391,611
  6. Step 6: Final answer
    x = 436,484.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.