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Finding the Fourth Proportional to 408,383.40, 613,231.20 and 308,656.20

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Solution

The fourth proportional to 408,383.40, 613,231.20 and 308,656.20 is: 463,480.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,383.40 : 613,231.20 = 308,656.20 : x
  2. Step 2: Convert to fraction form
    408,383.40/613,231.20 = 308,656.20/x
  3. Step 3: Cross multiply
    408,383.40x = 613,231.20 × 308,656.20
  4. Step 4: Simplify right side
    408,383.40x = 189,277,611,913.44
  5. Step 5: Solve for x
    x = 189,277,611,913.44/408,383.40
  6. Step 6: Final answer
    x = 463,480.18

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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.