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Finding the Fourth Proportional to 245,451.74, 338,725.42 and 138,020.82

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Solution

The fourth proportional to 245,451.74, 338,725.42 and 138,020.82 is: 190,469.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,451.74 : 338,725.42 = 138,020.82 : x
  2. Step 2: Convert to fraction form
    245,451.74/338,725.42 = 138,020.82/x
  3. Step 3: Cross multiply
    245,451.74x = 338,725.42 × 138,020.82
  4. Step 4: Simplify right side
    245,451.74x = 46,751,160,223.24
  5. Step 5: Solve for x
    x = 46,751,160,223.24/245,451.74
  6. Step 6: Final answer
    x = 190,469.87

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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.