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Finding the Fourth Proportional to 300,405.89, 450,682.55 and 90,043.63

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Solution

The fourth proportional to 300,405.89, 450,682.55 and 90,043.63 is: 135,087.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,405.89 : 450,682.55 = 90,043.63 : x
  2. Step 2: Convert to fraction form
    300,405.89/450,682.55 = 90,043.63/x
  3. Step 3: Cross multiply
    300,405.89x = 450,682.55 × 90,043.63
  4. Step 4: Simplify right side
    300,405.89x = 40,581,092,779.66
  5. Step 5: Solve for x
    x = 40,581,092,779.66/300,405.89
  6. Step 6: Final answer
    x = 135,087.54

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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.