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Finding the Fourth Proportional to 421,357.56, 631,987.11 and 168,627.84

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Solution

The fourth proportional to 421,357.56, 631,987.11 and 168,627.84 is: 252,922.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,357.56 : 631,987.11 = 168,627.84 : x
  2. Step 2: Convert to fraction form
    421,357.56/631,987.11 = 168,627.84/x
  3. Step 3: Cross multiply
    421,357.56x = 631,987.11 × 168,627.84
  4. Step 4: Simplify right side
    421,357.56x = 106,570,621,267.14
  5. Step 5: Solve for x
    x = 106,570,621,267.14/421,357.56
  6. Step 6: Final answer
    x = 252,922.06

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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.