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Finding the Fourth Proportional to 665,272.20, 997,908.30 and 399,851.40

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Solution

The fourth proportional to 665,272.20, 997,908.30 and 399,851.40 is: 599,777.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,272.20 : 997,908.30 = 399,851.40 : x
  2. Step 2: Convert to fraction form
    665,272.20/997,908.30 = 399,851.40/x
  3. Step 3: Cross multiply
    665,272.20x = 997,908.30 × 399,851.40
  4. Step 4: Simplify right side
    665,272.20x = 399,015,030,826.62
  5. Step 5: Solve for x
    x = 399,015,030,826.62/665,272.20
  6. Step 6: Final answer
    x = 599,777.10

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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.