Home / 664,584.63-917,115.05-378,098.57

Finding the Fourth Proportional to 664,584.63, 917,115.05 and 378,098.57

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Solution

The fourth proportional to 664,584.63, 917,115.05 and 378,098.57 is: 521,769.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,584.63 : 917,115.05 = 378,098.57 : x
  2. Step 2: Convert to fraction form
    664,584.63/917,115.05 = 378,098.57/x
  3. Step 3: Cross multiply
    664,584.63x = 917,115.05 × 378,098.57
  4. Step 4: Simplify right side
    664,584.63x = 346,759,882,454.41
  5. Step 5: Solve for x
    x = 346,759,882,454.41/664,584.63
  6. Step 6: Final answer
    x = 521,769.34

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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.