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Finding the Fourth Proportional to 489,963.26, 676,086.59 and 285,967.40

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Solution

The fourth proportional to 489,963.26, 676,086.59 and 285,967.40 is: 394,598.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,963.26 : 676,086.59 = 285,967.40 : x
  2. Step 2: Convert to fraction form
    489,963.26/676,086.59 = 285,967.40/x
  3. Step 3: Cross multiply
    489,963.26x = 676,086.59 × 285,967.40
  4. Step 4: Simplify right side
    489,963.26x = 193,338,719,506.90
  5. Step 5: Solve for x
    x = 193,338,719,506.90/489,963.26
  6. Step 6: Final answer
    x = 394,598.41

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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.