Home / 631,998.20-947,997.30-408,049.40

Finding the Fourth Proportional to 631,998.20, 947,997.30 and 408,049.40

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Solution

The fourth proportional to 631,998.20, 947,997.30 and 408,049.40 is: 612,074.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,998.20 : 947,997.30 = 408,049.40 : x
  2. Step 2: Convert to fraction form
    631,998.20/947,997.30 = 408,049.40/x
  3. Step 3: Cross multiply
    631,998.20x = 947,997.30 × 408,049.40
  4. Step 4: Simplify right side
    631,998.20x = 386,829,729,466.62
  5. Step 5: Solve for x
    x = 386,829,729,466.62/631,998.20
  6. Step 6: Final answer
    x = 612,074.10

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Double scale
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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.