Home / 680,184.92-938,736.06-389,900.36

Finding the Fourth Proportional to 680,184.92, 938,736.06 and 389,900.36

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Solution

The fourth proportional to 680,184.92, 938,736.06 and 389,900.36 is: 538,108.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,184.92 : 938,736.06 = 389,900.36 : x
  2. Step 2: Convert to fraction form
    680,184.92/938,736.06 = 389,900.36/x
  3. Step 3: Cross multiply
    680,184.92x = 938,736.06 × 389,900.36
  4. Step 4: Simplify right side
    680,184.92x = 366,013,527,738.98
  5. Step 5: Solve for x
    x = 366,013,527,738.98/680,184.92
  6. Step 6: Final answer
    x = 538,108.85

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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.