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Finding the Fourth Proportional to 326,494.40, 489,741.60 and 89,836.70

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Solution

The fourth proportional to 326,494.40, 489,741.60 and 89,836.70 is: 134,755.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,494.40 : 489,741.60 = 89,836.70 : x
  2. Step 2: Convert to fraction form
    326,494.40/489,741.60 = 89,836.70/x
  3. Step 3: Cross multiply
    326,494.40x = 489,741.60 × 89,836.70
  4. Step 4: Simplify right side
    326,494.40x = 43,996,769,196.72
  5. Step 5: Solve for x
    x = 43,996,769,196.72/326,494.40
  6. Step 6: Final answer
    x = 134,755.05

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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.