Home / 386,120.68-578,392.60-198,738.52

Finding the Fourth Proportional to 386,120.68, 578,392.60 and 198,738.52

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Solution

The fourth proportional to 386,120.68, 578,392.60 and 198,738.52 is: 297,701.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,120.68 : 578,392.60 = 198,738.52 : x
  2. Step 2: Convert to fraction form
    386,120.68/578,392.60 = 198,738.52/x
  3. Step 3: Cross multiply
    386,120.68x = 578,392.60 × 198,738.52
  4. Step 4: Simplify right side
    386,120.68x = 114,948,889,302.95
  5. Step 5: Solve for x
    x = 114,948,889,302.95/386,120.68
  6. Step 6: Final answer
    x = 297,701.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.