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Finding the Fourth Proportional to 667,768.92, 1,000,317.78 and 401,384.76

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Solution

The fourth proportional to 667,768.92, 1,000,317.78 and 401,384.76 is: 601,274.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,768.92 : 1,000,317.78 = 401,384.76 : x
  2. Step 2: Convert to fraction form
    667,768.92/1,000,317.78 = 401,384.76/x
  3. Step 3: Cross multiply
    667,768.92x = 1,000,317.78 × 401,384.76
  4. Step 4: Simplify right side
    667,768.92x = 401,512,312,049.03
  5. Step 5: Solve for x
    x = 401,512,312,049.03/667,768.92
  6. Step 6: Final answer
    x = 601,274.33

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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.