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Finding the Fourth Proportional to 386,842.40, 579,641.52 and 324,634.40

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Solution

The fourth proportional to 386,842.40, 579,641.52 and 324,634.40 is: 486,429.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,842.40 : 579,641.52 = 324,634.40 : x
  2. Step 2: Convert to fraction form
    386,842.40/579,641.52 = 324,634.40/x
  3. Step 3: Cross multiply
    386,842.40x = 579,641.52 × 324,634.40
  4. Step 4: Simplify right side
    386,842.40x = 188,171,577,060.29
  5. Step 5: Solve for x
    x = 188,171,577,060.29/386,842.40
  6. Step 6: Final answer
    x = 486,429.56

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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.