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Finding the Fourth Proportional to 398,906.90, 550,451.13 and 245,920.58

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Solution

The fourth proportional to 398,906.90, 550,451.13 and 245,920.58 is: 339,345.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,906.90 : 550,451.13 = 245,920.58 : x
  2. Step 2: Convert to fraction form
    398,906.90/550,451.13 = 245,920.58/x
  3. Step 3: Cross multiply
    398,906.90x = 550,451.13 × 245,920.58
  4. Step 4: Simplify right side
    398,906.90x = 135,367,261,151.26
  5. Step 5: Solve for x
    x = 135,367,261,151.26/398,906.90
  6. Step 6: Final answer
    x = 339,345.50

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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.