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Finding the Fourth Proportional to 421,999.45, 582,359.24 and 231,012.84

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Solution

The fourth proportional to 421,999.45, 582,359.24 and 231,012.84 is: 318,797.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,999.45 : 582,359.24 = 231,012.84 : x
  2. Step 2: Convert to fraction form
    421,999.45/582,359.24 = 231,012.84/x
  3. Step 3: Cross multiply
    421,999.45x = 582,359.24 × 231,012.84
  4. Step 4: Simplify right side
    421,999.45x = 134,532,461,932.64
  5. Step 5: Solve for x
    x = 134,532,461,932.64/421,999.45
  6. Step 6: Final answer
    x = 318,797.72

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1.5x scale

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.