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Finding the Fourth Proportional to 663,219.81, 995,023.44 and 213,930.72

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Solution

The fourth proportional to 663,219.81, 995,023.44 and 213,930.72 is: 320,958.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,219.81 : 995,023.44 = 213,930.72 : x
  2. Step 2: Convert to fraction form
    663,219.81/995,023.44 = 213,930.72/x
  3. Step 3: Cross multiply
    663,219.81x = 995,023.44 × 213,930.72
  4. Step 4: Simplify right side
    663,219.81x = 212,866,080,936.08
  5. Step 5: Solve for x
    x = 212,866,080,936.08/663,219.81
  6. Step 6: Final answer
    x = 320,958.57

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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.