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Finding the Fourth Proportional to 678,856.88, 936,406.96 and 403,027.53

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Solution

The fourth proportional to 678,856.88, 936,406.96 and 403,027.53 is: 555,931.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,856.88 : 936,406.96 = 403,027.53 : x
  2. Step 2: Convert to fraction form
    678,856.88/936,406.96 = 403,027.53/x
  3. Step 3: Cross multiply
    678,856.88x = 936,406.96 × 403,027.53
  4. Step 4: Simplify right side
    678,856.88x = 377,397,787,178.83
  5. Step 5: Solve for x
    x = 377,397,787,178.83/678,856.88
  6. Step 6: Final answer
    x = 555,931.30

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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.