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Finding the Fourth Proportional to 245,648.96, 338,991.52 and 138,218.88

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Solution

The fourth proportional to 245,648.96, 338,991.52 and 138,218.88 is: 190,739.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,648.96 : 338,991.52 = 138,218.88 : x
  2. Step 2: Convert to fraction form
    245,648.96/338,991.52 = 138,218.88/x
  3. Step 3: Cross multiply
    245,648.96x = 338,991.52 × 138,218.88
  4. Step 4: Simplify right side
    245,648.96x = 46,855,028,223.90
  5. Step 5: Solve for x
    x = 46,855,028,223.90/245,648.96
  6. Step 6: Final answer
    x = 190,739.78

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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.