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Finding the Fourth Proportional to 228,861, 315,847.62 and 128,278.44

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Solution

The fourth proportional to 228,861, 315,847.62 and 128,278.44 is: 177,035.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,861 : 315,847.62 = 128,278.44 : x
  2. Step 2: Convert to fraction form
    228,861/315,847.62 = 128,278.44/x
  3. Step 3: Cross multiply
    228,861x = 315,847.62 × 128,278.44
  4. Step 4: Simplify right side
    228,861x = 40,516,439,971.31
  5. Step 5: Solve for x
    x = 40,516,439,971.31/228,861
  6. Step 6: Final answer
    x = 177,035.14

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1.5x scale

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.