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Finding the Fourth Proportional to 319,956.90, 479,638.62 and 120,409.62

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Solution

The fourth proportional to 319,956.90, 479,638.62 and 120,409.62 is: 180,502.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,956.90 : 479,638.62 = 120,409.62 : x
  2. Step 2: Convert to fraction form
    319,956.90/479,638.62 = 120,409.62/x
  3. Step 3: Cross multiply
    319,956.90x = 479,638.62 × 120,409.62
  4. Step 4: Simplify right side
    319,956.90x = 57,753,103,971.52
  5. Step 5: Solve for x
    x = 57,753,103,971.52/319,956.90
  6. Step 6: Final answer
    x = 180,502.76

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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.