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Finding the Fourth Proportional to 251,388.36, 346,917.24 and 138,218.40

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Solution

The fourth proportional to 251,388.36, 346,917.24 and 138,218.40 is: 190,742.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,388.36 : 346,917.24 = 138,218.40 : x
  2. Step 2: Convert to fraction form
    251,388.36/346,917.24 = 138,218.40/x
  3. Step 3: Cross multiply
    251,388.36x = 346,917.24 × 138,218.40
  4. Step 4: Simplify right side
    251,388.36x = 47,950,345,845.22
  5. Step 5: Solve for x
    x = 47,950,345,845.22/251,388.36
  6. Step 6: Final answer
    x = 190,742.11

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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.