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Finding the Fourth Proportional to 385,655.88, 578,856.98 and 186,116.73

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Solution

The fourth proportional to 385,655.88, 578,856.98 and 186,116.73 is: 279,355.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,655.88 : 578,856.98 = 186,116.73 : x
  2. Step 2: Convert to fraction form
    385,655.88/578,856.98 = 186,116.73/x
  3. Step 3: Cross multiply
    385,655.88x = 578,856.98 × 186,116.73
  4. Step 4: Simplify right side
    385,655.88x = 107,734,967,324.69
  5. Step 5: Solve for x
    x = 107,734,967,324.69/385,655.88
  6. Step 6: Final answer
    x = 279,355.18

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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.