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Finding the Fourth Proportional to 617,919.60, 926,879.40 and 218,573.40

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Solution

The fourth proportional to 617,919.60, 926,879.40 and 218,573.40 is: 327,860.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,919.60 : 926,879.40 = 218,573.40 : x
  2. Step 2: Convert to fraction form
    617,919.60/926,879.40 = 218,573.40/x
  3. Step 3: Cross multiply
    617,919.60x = 926,879.40 × 218,573.40
  4. Step 4: Simplify right side
    617,919.60x = 202,591,181,847.96
  5. Step 5: Solve for x
    x = 202,591,181,847.96/617,919.60
  6. Step 6: Final answer
    x = 327,860.10

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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.