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Finding the Fourth Proportional to 326,951.05, 490,432.74 and 90,300.01

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Solution

The fourth proportional to 326,951.05, 490,432.74 and 90,300.01 is: 135,451.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,951.05 : 490,432.74 = 90,300.01 : x
  2. Step 2: Convert to fraction form
    326,951.05/490,432.74 = 90,300.01/x
  3. Step 3: Cross multiply
    326,951.05x = 490,432.74 × 90,300.01
  4. Step 4: Simplify right side
    326,951.05x = 44,286,081,326.33
  5. Step 5: Solve for x
    x = 44,286,081,326.33/326,951.05
  6. Step 6: Final answer
    x = 135,451.72

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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.