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Finding the Fourth Proportional to 640,394.88, 883,287.36 and 489,229.44

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Solution

The fourth proportional to 640,394.88, 883,287.36 and 489,229.44 is: 674,787.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,394.88 : 883,287.36 = 489,229.44 : x
  2. Step 2: Convert to fraction form
    640,394.88/883,287.36 = 489,229.44/x
  3. Step 3: Cross multiply
    640,394.88x = 883,287.36 × 489,229.44
  4. Step 4: Simplify right side
    640,394.88x = 432,130,180,491.88
  5. Step 5: Solve for x
    x = 432,130,180,491.88/640,394.88
  6. Step 6: Final answer
    x = 674,787.06

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1.5x scale

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.