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Finding the Fourth Proportional to 421,361.80, 632,105.70 and 155,102.02

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Solution

The fourth proportional to 421,361.80, 632,105.70 and 155,102.02 is: 232,676.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,361.80 : 632,105.70 = 155,102.02 : x
  2. Step 2: Convert to fraction form
    421,361.80/632,105.70 = 155,102.02/x
  3. Step 3: Cross multiply
    421,361.80x = 632,105.70 × 155,102.02
  4. Step 4: Simplify right side
    421,361.80x = 98,040,870,923.51
  5. Step 5: Solve for x
    x = 98,040,870,923.51/421,361.80
  6. Step 6: Final answer
    x = 232,676.22

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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.