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Finding the Fourth Proportional to 399,025.36, 598,538.72 and 319,568.68

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Solution

The fourth proportional to 399,025.36, 598,538.72 and 319,568.68 is: 479,353.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,025.36 : 598,538.72 = 319,568.68 : x
  2. Step 2: Convert to fraction form
    399,025.36/598,538.72 = 319,568.68/x
  3. Step 3: Cross multiply
    399,025.36x = 598,538.72 × 319,568.68
  4. Step 4: Simplify right side
    399,025.36x = 191,274,228,679.29
  5. Step 5: Solve for x
    x = 191,274,228,679.29/399,025.36
  6. Step 6: Final answer
    x = 479,353.56

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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.