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Finding the Fourth Proportional to 664,414.64, 916,940.88 and 378,026.72

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Solution

The fourth proportional to 664,414.64, 916,940.88 and 378,026.72 is: 521,704.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,414.64 : 916,940.88 = 378,026.72 : x
  2. Step 2: Convert to fraction form
    664,414.64/916,940.88 = 378,026.72/x
  3. Step 3: Cross multiply
    664,414.64x = 916,940.88 × 378,026.72
  4. Step 4: Simplify right side
    664,414.64x = 346,628,153,300.31
  5. Step 5: Solve for x
    x = 346,628,153,300.31/664,414.64
  6. Step 6: Final answer
    x = 521,704.57

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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.