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Finding the Fourth Proportional to 245,630.45, 338,945.84 and 138,198.13

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Solution

The fourth proportional to 245,630.45, 338,945.84 and 138,198.13 is: 190,699.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,630.45 : 338,945.84 = 138,198.13 : x
  2. Step 2: Convert to fraction form
    245,630.45/338,945.84 = 138,198.13/x
  3. Step 3: Cross multiply
    245,630.45x = 338,945.84 × 138,198.13
  4. Step 4: Simplify right side
    245,630.45x = 46,841,681,259.28
  5. Step 5: Solve for x
    x = 46,841,681,259.28/245,630.45
  6. Step 6: Final answer
    x = 190,699.81

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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.