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Finding the Fourth Proportional to 386,375.70, 579,851.55 and 199,290.90

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Solution

The fourth proportional to 386,375.70, 579,851.55 and 199,290.90 is: 299,084.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,375.70 : 579,851.55 = 199,290.90 : x
  2. Step 2: Convert to fraction form
    386,375.70/579,851.55 = 199,290.90/x
  3. Step 3: Cross multiply
    386,375.70x = 579,851.55 × 199,290.90
  4. Step 4: Simplify right side
    386,375.70x = 115,559,137,265.90
  5. Step 5: Solve for x
    x = 115,559,137,265.90/386,375.70
  6. Step 6: Final answer
    x = 299,084.90

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1.5x scale

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.