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Finding the Fourth Proportional to 421,139.80, 631,640.48 and 151,212.06

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Solution

The fourth proportional to 421,139.80, 631,640.48 and 151,212.06 is: 226,793.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,139.80 : 631,640.48 = 151,212.06 : x
  2. Step 2: Convert to fraction form
    421,139.80/631,640.48 = 151,212.06/x
  3. Step 3: Cross multiply
    421,139.80x = 631,640.48 × 151,212.06
  4. Step 4: Simplify right side
    421,139.80x = 95,511,658,160.19
  5. Step 5: Solve for x
    x = 95,511,658,160.19/421,139.80
  6. Step 6: Final answer
    x = 226,793.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.