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Finding the Fourth Proportional to 578,704.72, 868,618.20 and 279,396.40

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Solution

The fourth proportional to 578,704.72, 868,618.20 and 279,396.40 is: 419,365.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,704.72 : 868,618.20 = 279,396.40 : x
  2. Step 2: Convert to fraction form
    578,704.72/868,618.20 = 279,396.40/x
  3. Step 3: Cross multiply
    578,704.72x = 868,618.20 × 279,396.40
  4. Step 4: Simplify right side
    578,704.72x = 242,688,798,054.48
  5. Step 5: Solve for x
    x = 242,688,798,054.48/578,704.72
  6. Step 6: Final answer
    x = 419,365.51

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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.