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Finding the Fourth Proportional to 611,704.20, 917,556.30 and 422,747.40

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Solution

The fourth proportional to 611,704.20, 917,556.30 and 422,747.40 is: 634,121.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,704.20 : 917,556.30 = 422,747.40 : x
  2. Step 2: Convert to fraction form
    611,704.20/917,556.30 = 422,747.40/x
  3. Step 3: Cross multiply
    611,704.20x = 917,556.30 × 422,747.40
  4. Step 4: Simplify right side
    611,704.20x = 387,894,540,178.62
  5. Step 5: Solve for x
    x = 387,894,540,178.62/611,704.20
  6. Step 6: Final answer
    x = 634,121.10

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Similar ratio
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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.