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Finding the Fourth Proportional to 389,093.28, 583,645.76 and 108,612

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Solution

The fourth proportional to 389,093.28, 583,645.76 and 108,612 is: 162,919.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,093.28 : 583,645.76 = 108,612 : x
  2. Step 2: Convert to fraction form
    389,093.28/583,645.76 = 108,612/x
  3. Step 3: Cross multiply
    389,093.28x = 583,645.76 × 108,612
  4. Step 4: Simplify right side
    389,093.28x = 63,390,933,285.12
  5. Step 5: Solve for x
    x = 63,390,933,285.12/389,093.28
  6. Step 6: Final answer
    x = 162,919.63

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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.