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Finding the Fourth Proportional to 300,090.90, 420,827.10 and 300,090.90

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Solution

The fourth proportional to 300,090.90, 420,827.10 and 300,090.90 is: 420,827.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,090.90 : 420,827.10 = 300,090.90 : x
  2. Step 2: Convert to fraction form
    300,090.90/420,827.10 = 300,090.90/x
  3. Step 3: Cross multiply
    300,090.90x = 420,827.10 × 300,090.90
  4. Step 4: Simplify right side
    300,090.90x = 126,286,383,183.39
  5. Step 5: Solve for x
    x = 126,286,383,183.39/300,090.90
  6. Step 6: Final answer
    x = 420,827.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.