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Finding the Fourth Proportional to 667,731.21, 921,472.27 and 361,807.51

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Solution

The fourth proportional to 667,731.21, 921,472.27 and 361,807.51 is: 499,296.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,731.21 : 921,472.27 = 361,807.51 : x
  2. Step 2: Convert to fraction form
    667,731.21/921,472.27 = 361,807.51/x
  3. Step 3: Cross multiply
    667,731.21x = 921,472.27 × 361,807.51
  4. Step 4: Simplify right side
    667,731.21x = 333,395,582,935.39
  5. Step 5: Solve for x
    x = 333,395,582,935.39/667,731.21
  6. Step 6: Final answer
    x = 499,296.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.