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Finding the Fourth Proportional to 667,900.32, 921,713.61 and 361,986.51

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Solution

The fourth proportional to 667,900.32, 921,713.61 and 361,986.51 is: 499,547.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,900.32 : 921,713.61 = 361,986.51 : x
  2. Step 2: Convert to fraction form
    667,900.32/921,713.61 = 361,986.51/x
  3. Step 3: Cross multiply
    667,900.32x = 921,713.61 × 361,986.51
  4. Step 4: Simplify right side
    667,900.32x = 333,647,892,903.40
  5. Step 5: Solve for x
    x = 333,647,892,903.40/667,900.32
  6. Step 6: Final answer
    x = 499,547.44

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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.