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Finding the Fourth Proportional to 386,020.84, 579,003.36 and 119,774.56

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Solution

The fourth proportional to 386,020.84, 579,003.36 and 119,774.56 is: 179,653.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,020.84 : 579,003.36 = 119,774.56 : x
  2. Step 2: Convert to fraction form
    386,020.84/579,003.36 = 119,774.56/x
  3. Step 3: Cross multiply
    386,020.84x = 579,003.36 × 119,774.56
  4. Step 4: Simplify right side
    386,020.84x = 69,349,872,682.52
  5. Step 5: Solve for x
    x = 69,349,872,682.52/386,020.84
  6. Step 6: Final answer
    x = 179,653.18

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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.