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Finding the Fourth Proportional to 408,258.96, 611,078.22 and 218,244.30

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Solution

The fourth proportional to 408,258.96, 611,078.22 and 218,244.30 is: 326,666.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,258.96 : 611,078.22 = 218,244.30 : x
  2. Step 2: Convert to fraction form
    408,258.96/611,078.22 = 218,244.30/x
  3. Step 3: Cross multiply
    408,258.96x = 611,078.22 × 218,244.30
  4. Step 4: Simplify right side
    408,258.96x = 133,364,338,369.15
  5. Step 5: Solve for x
    x = 133,364,338,369.15/408,258.96
  6. Step 6: Final answer
    x = 326,666.04

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1.5x scale

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.