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Finding the Fourth Proportional to 663,442.68, 915,516.36 and 376,923

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Solution

The fourth proportional to 663,442.68, 915,516.36 and 376,923 is: 520,134.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,442.68 : 915,516.36 = 376,923 : x
  2. Step 2: Convert to fraction form
    663,442.68/915,516.36 = 376,923/x
  3. Step 3: Cross multiply
    663,442.68x = 915,516.36 × 376,923
  4. Step 4: Simplify right side
    663,442.68x = 345,079,172,960.28
  5. Step 5: Solve for x
    x = 345,079,172,960.28/663,442.68
  6. Step 6: Final answer
    x = 520,134.12

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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.