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Finding the Fourth Proportional to 245,645.51, 338,997.43 and 138,219.36

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Solution

The fourth proportional to 245,645.51, 338,997.43 and 138,219.36 is: 190,746.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,645.51 : 338,997.43 = 138,219.36 : x
  2. Step 2: Convert to fraction form
    245,645.51/338,997.43 = 138,219.36/x
  3. Step 3: Cross multiply
    245,645.51x = 338,997.43 × 138,219.36
  4. Step 4: Simplify right side
    245,645.51x = 46,856,008,235.90
  5. Step 5: Solve for x
    x = 46,856,008,235.90/245,645.51
  6. Step 6: Final answer
    x = 190,746.45

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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.