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Finding the Fourth Proportional to 667,744.95, 921,478.57 and 361,814.18

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Solution

The fourth proportional to 667,744.95, 921,478.57 and 361,814.18 is: 499,298.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,744.95 : 921,478.57 = 361,814.18 : x
  2. Step 2: Convert to fraction form
    667,744.95/921,478.57 = 361,814.18/x
  3. Step 3: Cross multiply
    667,744.95x = 921,478.57 × 361,814.18
  4. Step 4: Simplify right side
    667,744.95x = 333,404,013,192.12
  5. Step 5: Solve for x
    x = 333,404,013,192.12/667,744.95
  6. Step 6: Final answer
    x = 499,298.44

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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.