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Finding the Fourth Proportional to 421,091.01, 580,703.97 and 275,679.81

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Solution

The fourth proportional to 421,091.01, 580,703.97 and 275,679.81 is: 380,175.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,091.01 : 580,703.97 = 275,679.81 : x
  2. Step 2: Convert to fraction form
    421,091.01/580,703.97 = 275,679.81/x
  3. Step 3: Cross multiply
    421,091.01x = 580,703.97 × 275,679.81
  4. Step 4: Simplify right side
    421,091.01x = 160,088,360,115.85
  5. Step 5: Solve for x
    x = 160,088,360,115.85/421,091.01
  6. Step 6: Final answer
    x = 380,175.20

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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.