Home / 489,231.25-675,140.34-285,422.29

Finding the Fourth Proportional to 489,231.25, 675,140.34 and 285,422.29

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Solution

The fourth proportional to 489,231.25, 675,140.34 and 285,422.29 is: 393,883.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,231.25 : 675,140.34 = 285,422.29 : x
  2. Step 2: Convert to fraction form
    489,231.25/675,140.34 = 285,422.29/x
  3. Step 3: Cross multiply
    489,231.25x = 675,140.34 × 285,422.29
  4. Step 4: Simplify right side
    489,231.25x = 192,700,101,914.18
  5. Step 5: Solve for x
    x = 192,700,101,914.18/489,231.25
  6. Step 6: Final answer
    x = 393,883.47

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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.