Home / 664,520.70-917,030.39-378,040.17

Finding the Fourth Proportional to 664,520.70, 917,030.39 and 378,040.17

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Solution

The fourth proportional to 664,520.70, 917,030.39 and 378,040.17 is: 521,690.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,520.70 : 917,030.39 = 378,040.17 : x
  2. Step 2: Convert to fraction form
    664,520.70/917,030.39 = 378,040.17/x
  3. Step 3: Cross multiply
    664,520.70x = 917,030.39 × 378,040.17
  4. Step 4: Simplify right side
    664,520.70x = 346,674,322,640.57
  5. Step 5: Solve for x
    x = 346,674,322,640.57/664,520.70
  6. Step 6: Final answer
    x = 521,690.78

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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.