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Finding the Fourth Proportional to 326,886.24, 490,292.64 and 90,262.56

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Solution

The fourth proportional to 326,886.24, 490,292.64 and 90,262.56 is: 135,383.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,886.24 : 490,292.64 = 90,262.56 : x
  2. Step 2: Convert to fraction form
    326,886.24/490,292.64 = 90,262.56/x
  3. Step 3: Cross multiply
    326,886.24x = 490,292.64 × 90,262.56
  4. Step 4: Simplify right side
    326,886.24x = 44,255,068,835.56
  5. Step 5: Solve for x
    x = 44,255,068,835.56/326,886.24
  6. Step 6: Final answer
    x = 135,383.70

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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.