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Finding the Fourth Proportional to 667,805.75, 999,314.15 and 578,156.80

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Solution

The fourth proportional to 667,805.75, 999,314.15 and 578,156.80 is: 865,162.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,805.75 : 999,314.15 = 578,156.80 : x
  2. Step 2: Convert to fraction form
    667,805.75/999,314.15 = 578,156.80/x
  3. Step 3: Cross multiply
    667,805.75x = 999,314.15 × 578,156.80
  4. Step 4: Simplify right side
    667,805.75x = 577,760,271,158.72
  5. Step 5: Solve for x
    x = 577,760,271,158.72/667,805.75
  6. Step 6: Final answer
    x = 865,162.17

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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.