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Finding the Fourth Proportional to 681,027.84, 939,392.40 and 489,738.24

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Solution

The fourth proportional to 681,027.84, 939,392.40 and 489,738.24 is: 675,532.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,027.84 : 939,392.40 = 489,738.24 : x
  2. Step 2: Convert to fraction form
    681,027.84/939,392.40 = 489,738.24/x
  3. Step 3: Cross multiply
    681,027.84x = 939,392.40 × 489,738.24
  4. Step 4: Simplify right side
    681,027.84x = 460,056,380,645.38
  5. Step 5: Solve for x
    x = 460,056,380,645.38/681,027.84
  6. Step 6: Final answer
    x = 675,532.41

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Double scale
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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.