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Finding the Fourth Proportional to 379,461.28, 523,676.72 and 218,340.80

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Solution

The fourth proportional to 379,461.28, 523,676.72 and 218,340.80 is: 301,321.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,461.28 : 523,676.72 = 218,340.80 : x
  2. Step 2: Convert to fraction form
    379,461.28/523,676.72 = 218,340.80/x
  3. Step 3: Cross multiply
    379,461.28x = 523,676.72 × 218,340.80
  4. Step 4: Simplify right side
    379,461.28x = 114,339,993,986.18
  5. Step 5: Solve for x
    x = 114,339,993,986.18/379,461.28
  6. Step 6: Final answer
    x = 301,321.90

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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.