Home / 285,374.09-428,065.32-135,629.66

Finding the Fourth Proportional to 285,374.09, 428,065.32 and 135,629.66

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Solution

The fourth proportional to 285,374.09, 428,065.32 and 135,629.66 is: 203,446.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,374.09 : 428,065.32 = 135,629.66 : x
  2. Step 2: Convert to fraction form
    285,374.09/428,065.32 = 135,629.66/x
  3. Step 3: Cross multiply
    285,374.09x = 428,065.32 × 135,629.66
  4. Step 4: Simplify right side
    285,374.09x = 58,058,351,669.06
  5. Step 5: Solve for x
    x = 58,058,351,669.06/285,374.09
  6. Step 6: Final answer
    x = 203,446.48

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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.