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Finding the Fourth Proportional to 663,308.51, 915,368.78 and 376,844.32

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Solution

The fourth proportional to 663,308.51, 915,368.78 and 376,844.32 is: 520,046.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,308.51 : 915,368.78 = 376,844.32 : x
  2. Step 2: Convert to fraction form
    663,308.51/915,368.78 = 376,844.32/x
  3. Step 3: Cross multiply
    663,308.51x = 915,368.78 × 376,844.32
  4. Step 4: Simplify right side
    663,308.51x = 344,951,524,102.02
  5. Step 5: Solve for x
    x = 344,951,524,102.02/663,308.51
  6. Step 6: Final answer
    x = 520,046.88

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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.