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Finding the Fourth Proportional to 326,886.21, 490,357.47 and 90,228.90

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Solution

The fourth proportional to 326,886.21, 490,357.47 and 90,228.90 is: 135,351.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,886.21 : 490,357.47 = 90,228.90 : x
  2. Step 2: Convert to fraction form
    326,886.21/490,357.47 = 90,228.90/x
  3. Step 3: Cross multiply
    326,886.21x = 490,357.47 × 90,228.90
  4. Step 4: Simplify right side
    326,886.21x = 44,244,415,124.88
  5. Step 5: Solve for x
    x = 44,244,415,124.88/326,886.21
  6. Step 6: Final answer
    x = 135,351.12

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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.