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Finding the Fourth Proportional to 663,338.34, 915,431.38 and 376,906.94

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Solution

The fourth proportional to 663,338.34, 915,431.38 and 376,906.94 is: 520,145.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,338.34 : 915,431.38 = 376,906.94 : x
  2. Step 2: Convert to fraction form
    663,338.34/915,431.38 = 376,906.94/x
  3. Step 3: Cross multiply
    663,338.34x = 915,431.38 × 376,906.94
  4. Step 4: Simplify right side
    663,338.34x = 345,032,440,215.78
  5. Step 5: Solve for x
    x = 345,032,440,215.78/663,338.34
  6. Step 6: Final answer
    x = 520,145.48

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1.5x scale

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.