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Finding the Fourth Proportional to 644,112.80, 965,823.60 and 269,712.80

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Solution

The fourth proportional to 644,112.80, 965,823.60 and 269,712.80 is: 404,424.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,112.80 : 965,823.60 = 269,712.80 : x
  2. Step 2: Convert to fraction form
    644,112.80/965,823.60 = 269,712.80/x
  3. Step 3: Cross multiply
    644,112.80x = 965,823.60 × 269,712.80
  4. Step 4: Simplify right side
    644,112.80x = 260,494,987,462.08
  5. Step 5: Solve for x
    x = 260,494,987,462.08/644,112.80
  6. Step 6: Final answer
    x = 404,424.49

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.