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Finding the Fourth Proportional to 455,220.40, 682,830.60 and 139,676.80

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Solution

The fourth proportional to 455,220.40, 682,830.60 and 139,676.80 is: 209,515.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,220.40 : 682,830.60 = 139,676.80 : x
  2. Step 2: Convert to fraction form
    455,220.40/682,830.60 = 139,676.80/x
  3. Step 3: Cross multiply
    455,220.40x = 682,830.60 × 139,676.80
  4. Step 4: Simplify right side
    455,220.40x = 95,375,593,150.08
  5. Step 5: Solve for x
    x = 95,375,593,150.08/455,220.40
  6. Step 6: Final answer
    x = 209,515.20

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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.