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Finding the Fourth Proportional to 667,167.84, 920,685.15 and 361,236.51

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Solution

The fourth proportional to 667,167.84, 920,685.15 and 361,236.51 is: 498,502.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,167.84 : 920,685.15 = 361,236.51 : x
  2. Step 2: Convert to fraction form
    667,167.84/920,685.15 = 361,236.51/x
  3. Step 3: Cross multiply
    667,167.84x = 920,685.15 × 361,236.51
  4. Step 4: Simplify right side
    667,167.84x = 332,585,090,394.83
  5. Step 5: Solve for x
    x = 332,585,090,394.83/667,167.84
  6. Step 6: Final answer
    x = 498,502.88

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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.