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Finding the Fourth Proportional to 386,027.84, 579,013.86 and 119,781.56

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Solution

The fourth proportional to 386,027.84, 579,013.86 and 119,781.56 is: 179,663.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,027.84 : 579,013.86 = 119,781.56 : x
  2. Step 2: Convert to fraction form
    386,027.84/579,013.86 = 119,781.56/x
  3. Step 3: Cross multiply
    386,027.84x = 579,013.86 × 119,781.56
  4. Step 4: Simplify right side
    386,027.84x = 69,355,183,412.42
  5. Step 5: Solve for x
    x = 69,355,183,412.42/386,027.84
  6. Step 6: Final answer
    x = 179,663.68

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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.