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Finding the Fourth Proportional to 409,204.20, 613,806.30 and 128,807.40

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Solution

The fourth proportional to 409,204.20, 613,806.30 and 128,807.40 is: 193,211.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,204.20 : 613,806.30 = 128,807.40 : x
  2. Step 2: Convert to fraction form
    409,204.20/613,806.30 = 128,807.40/x
  3. Step 3: Cross multiply
    409,204.20x = 613,806.30 × 128,807.40
  4. Step 4: Simplify right side
    409,204.20x = 79,062,793,606.62
  5. Step 5: Solve for x
    x = 79,062,793,606.62/409,204.20
  6. Step 6: Final answer
    x = 193,211.10

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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.