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Finding the Fourth Proportional to 381,606.40, 572,409.60 and 115,339.15

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Solution

The fourth proportional to 381,606.40, 572,409.60 and 115,339.15 is: 173,008.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,606.40 : 572,409.60 = 115,339.15 : x
  2. Step 2: Convert to fraction form
    381,606.40/572,409.60 = 115,339.15/x
  3. Step 3: Cross multiply
    381,606.40x = 572,409.60 × 115,339.15
  4. Step 4: Simplify right side
    381,606.40x = 66,021,236,715.84
  5. Step 5: Solve for x
    x = 66,021,236,715.84/381,606.40
  6. Step 6: Final answer
    x = 173,008.73

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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.