Home / 664,615.46-917,085.30-378,140.34

Finding the Fourth Proportional to 664,615.46, 917,085.30 and 378,140.34

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Solution

The fourth proportional to 664,615.46, 917,085.30 and 378,140.34 is: 521,785.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,615.46 : 917,085.30 = 378,140.34 : x
  2. Step 2: Convert to fraction form
    664,615.46/917,085.30 = 378,140.34/x
  3. Step 3: Cross multiply
    664,615.46x = 917,085.30 × 378,140.34
  4. Step 4: Simplify right side
    664,615.46x = 346,786,947,151.00
  5. Step 5: Solve for x
    x = 346,786,947,151.00/664,615.46
  6. Step 6: Final answer
    x = 521,785.86

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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.