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Finding the Fourth Proportional to 338,853.20, 508,481.40 and 128,512.40

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Solution

The fourth proportional to 338,853.20, 508,481.40 and 128,512.40 is: 192,845.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,853.20 : 508,481.40 = 128,512.40 : x
  2. Step 2: Convert to fraction form
    338,853.20/508,481.40 = 128,512.40/x
  3. Step 3: Cross multiply
    338,853.20x = 508,481.40 × 128,512.40
  4. Step 4: Simplify right side
    338,853.20x = 65,346,165,069.36
  5. Step 5: Solve for x
    x = 65,346,165,069.36/338,853.20
  6. Step 6: Final answer
    x = 192,845.06

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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.