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Finding the Fourth Proportional to 489,399.17, 675,219.51 and 285,305.60

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Solution

The fourth proportional to 489,399.17, 675,219.51 and 285,305.60 is: 393,633.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,399.17 : 675,219.51 = 285,305.60 : x
  2. Step 2: Convert to fraction form
    489,399.17/675,219.51 = 285,305.60/x
  3. Step 3: Cross multiply
    489,399.17x = 675,219.51 × 285,305.60
  4. Step 4: Simplify right side
    489,399.17x = 192,643,904,593.33
  5. Step 5: Solve for x
    x = 192,643,904,593.33/489,399.17
  6. Step 6: Final answer
    x = 393,633.49

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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.