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Finding the Fourth Proportional to 291,279.48, 401,965.74 and 170,443.97

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Solution

The fourth proportional to 291,279.48, 401,965.74 and 170,443.97 is: 235,212.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,279.48 : 401,965.74 = 170,443.97 : x
  2. Step 2: Convert to fraction form
    291,279.48/401,965.74 = 170,443.97/x
  3. Step 3: Cross multiply
    291,279.48x = 401,965.74 × 170,443.97
  4. Step 4: Simplify right side
    291,279.48x = 68,512,637,157.66
  5. Step 5: Solve for x
    x = 68,512,637,157.66/291,279.48
  6. Step 6: Final answer
    x = 235,212.71

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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.