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Finding the Fourth Proportional to 421,361.16, 632,291.20 and 155,308.56

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Solution

The fourth proportional to 421,361.16, 632,291.20 and 155,308.56 is: 233,054.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,361.16 : 632,291.20 = 155,308.56 : x
  2. Step 2: Convert to fraction form
    421,361.16/632,291.20 = 155,308.56/x
  3. Step 3: Cross multiply
    421,361.16x = 632,291.20 × 155,308.56
  4. Step 4: Simplify right side
    421,361.16x = 98,200,235,772.67
  5. Step 5: Solve for x
    x = 98,200,235,772.67/421,361.16
  6. Step 6: Final answer
    x = 233,054.79

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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.