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Finding the Fourth Proportional to 647,610.40, 970,249.20 and 398,000.80

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Solution

The fourth proportional to 647,610.40, 970,249.20 and 398,000.80 is: 596,284.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,610.40 : 970,249.20 = 398,000.80 : x
  2. Step 2: Convert to fraction form
    647,610.40/970,249.20 = 398,000.80/x
  3. Step 3: Cross multiply
    647,610.40x = 970,249.20 × 398,000.80
  4. Step 4: Simplify right side
    647,610.40x = 386,159,957,799.36
  5. Step 5: Solve for x
    x = 386,159,957,799.36/647,610.40
  6. Step 6: Final answer
    x = 596,284.37

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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.