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Finding the Fourth Proportional to 408,717.64, 613,174.88 and 128,234.88

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Solution

The fourth proportional to 408,717.64, 613,174.88 and 128,234.88 is: 192,383.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,717.64 : 613,174.88 = 128,234.88 : x
  2. Step 2: Convert to fraction form
    408,717.64/613,174.88 = 128,234.88/x
  3. Step 3: Cross multiply
    408,717.64x = 613,174.88 × 128,234.88
  4. Step 4: Simplify right side
    408,717.64x = 78,630,407,155.81
  5. Step 5: Solve for x
    x = 78,630,407,155.81/408,717.64
  6. Step 6: Final answer
    x = 192,383.20

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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.