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Finding the Fourth Proportional to 667,803.14, 921,389 and 381,266.18

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Solution

The fourth proportional to 667,803.14, 921,389 and 381,266.18 is: 526,044.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,803.14 : 921,389 = 381,266.18 : x
  2. Step 2: Convert to fraction form
    667,803.14/921,389 = 381,266.18/x
  3. Step 3: Cross multiply
    667,803.14x = 921,389 × 381,266.18
  4. Step 4: Simplify right side
    667,803.14x = 351,294,464,324.02
  5. Step 5: Solve for x
    x = 351,294,464,324.02/667,803.14
  6. Step 6: Final answer
    x = 526,044.94

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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.