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Finding the Fourth Proportional to 489,036.58, 674,935.50 and 285,091.54

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Solution

The fourth proportional to 489,036.58, 674,935.50 and 285,091.54 is: 393,464.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,036.58 : 674,935.50 = 285,091.54 : x
  2. Step 2: Convert to fraction form
    489,036.58/674,935.50 = 285,091.54/x
  3. Step 3: Cross multiply
    489,036.58x = 674,935.50 × 285,091.54
  4. Step 4: Simplify right side
    489,036.58x = 192,418,400,477.43
  5. Step 5: Solve for x
    x = 192,418,400,477.43/489,036.58
  6. Step 6: Final answer
    x = 393,464.23

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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.