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Finding the Fourth Proportional to 300,756.75, 451,135.13 and 90,394.89

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Solution

The fourth proportional to 300,756.75, 451,135.13 and 90,394.89 is: 135,592.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,756.75 : 451,135.13 = 90,394.89 : x
  2. Step 2: Convert to fraction form
    300,756.75/451,135.13 = 90,394.89/x
  3. Step 3: Cross multiply
    300,756.75x = 451,135.13 × 90,394.89
  4. Step 4: Simplify right side
    300,756.75x = 40,780,309,999.51
  5. Step 5: Solve for x
    x = 40,780,309,999.51/300,756.75
  6. Step 6: Final answer
    x = 135,592.34

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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.