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Finding the Fourth Proportional to 421,909.53, 582,212.72 and 230,886.02

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Solution

The fourth proportional to 421,909.53, 582,212.72 and 230,886.02 is: 318,610.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,909.53 : 582,212.72 = 230,886.02 : x
  2. Step 2: Convert to fraction form
    421,909.53/582,212.72 = 230,886.02/x
  3. Step 3: Cross multiply
    421,909.53x = 582,212.72 × 230,886.02
  4. Step 4: Simplify right side
    421,909.53x = 134,424,775,380.33
  5. Step 5: Solve for x
    x = 134,424,775,380.33/421,909.53
  6. Step 6: Final answer
    x = 318,610.43

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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.