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Finding the Fourth Proportional to 326,915.43, 490,372.43 and 87,029.39

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Solution

The fourth proportional to 326,915.43, 490,372.43 and 87,029.39 is: 130,543.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,915.43 : 490,372.43 = 87,029.39 : x
  2. Step 2: Convert to fraction form
    326,915.43/490,372.43 = 87,029.39/x
  3. Step 3: Cross multiply
    326,915.43x = 490,372.43 × 87,029.39
  4. Step 4: Simplify right side
    326,915.43x = 42,676,810,568.71
  5. Step 5: Solve for x
    x = 42,676,810,568.71/326,915.43
  6. Step 6: Final answer
    x = 130,543.89

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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.