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Finding the Fourth Proportional to 285,669.84, 394,218 and 158,344.32

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Solution

The fourth proportional to 285,669.84, 394,218 and 158,344.32 is: 218,511.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,669.84 : 394,218 = 158,344.32 : x
  2. Step 2: Convert to fraction form
    285,669.84/394,218 = 158,344.32/x
  3. Step 3: Cross multiply
    285,669.84x = 394,218 × 158,344.32
  4. Step 4: Simplify right side
    285,669.84x = 62,422,181,141.76
  5. Step 5: Solve for x
    x = 62,422,181,141.76/285,669.84
  6. Step 6: Final answer
    x = 218,511.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.