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Finding the Fourth Proportional to 665,271.20, 997,906.80 and 399,850.40

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Solution

The fourth proportional to 665,271.20, 997,906.80 and 399,850.40 is: 599,775.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,271.20 : 997,906.80 = 399,850.40 : x
  2. Step 2: Convert to fraction form
    665,271.20/997,906.80 = 399,850.40/x
  3. Step 3: Cross multiply
    665,271.20x = 997,906.80 × 399,850.40
  4. Step 4: Simplify right side
    665,271.20x = 399,013,433,142.72
  5. Step 5: Solve for x
    x = 399,013,433,142.72/665,271.20
  6. Step 6: Final answer
    x = 599,775.60

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Similar ratio
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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.