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Finding the Fourth Proportional to 361,396.40, 541,878.60 and 221,255.60

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Solution

The fourth proportional to 361,396.40, 541,878.60 and 221,255.60 is: 331,751.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,396.40 : 541,878.60 = 221,255.60 : x
  2. Step 2: Convert to fraction form
    361,396.40/541,878.60 = 221,255.60/x
  3. Step 3: Cross multiply
    361,396.40x = 541,878.60 × 221,255.60
  4. Step 4: Simplify right side
    361,396.40x = 119,893,674,770.16
  5. Step 5: Solve for x
    x = 119,893,674,770.16/361,396.40
  6. Step 6: Final answer
    x = 331,751.16

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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.