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Finding the Fourth Proportional to 644,843.40, 967,265.10 and 409,230.60

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Solution

The fourth proportional to 644,843.40, 967,265.10 and 409,230.60 is: 613,845.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,843.40 : 967,265.10 = 409,230.60 : x
  2. Step 2: Convert to fraction form
    644,843.40/967,265.10 = 409,230.60/x
  3. Step 3: Cross multiply
    644,843.40x = 967,265.10 × 409,230.60
  4. Step 4: Simplify right side
    644,843.40x = 395,834,477,232.06
  5. Step 5: Solve for x
    x = 395,834,477,232.06/644,843.40
  6. Step 6: Final answer
    x = 613,845.90

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Double scale
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Similar ratio
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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.