Home / 664,981.35-917,680.13-378,519.88

Finding the Fourth Proportional to 664,981.35, 917,680.13 and 378,519.88

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Solution

The fourth proportional to 664,981.35, 917,680.13 and 378,519.88 is: 522,360.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,981.35 : 917,680.13 = 378,519.88 : x
  2. Step 2: Convert to fraction form
    664,981.35/917,680.13 = 378,519.88/x
  3. Step 3: Cross multiply
    664,981.35x = 917,680.13 × 378,519.88
  4. Step 4: Simplify right side
    664,981.35x = 347,360,172,685.98
  5. Step 5: Solve for x
    x = 347,360,172,685.98/664,981.35
  6. Step 6: Final answer
    x = 522,360.77

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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.