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Finding the Fourth Proportional to 355,416.09, 533,217.49 and 127,734.69

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Solution

The fourth proportional to 355,416.09, 533,217.49 and 127,734.69 is: 191,635.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,416.09 : 533,217.49 = 127,734.69 : x
  2. Step 2: Convert to fraction form
    355,416.09/533,217.49 = 127,734.69/x
  3. Step 3: Cross multiply
    355,416.09x = 533,217.49 × 127,734.69
  4. Step 4: Simplify right side
    355,416.09x = 68,110,370,187.12
  5. Step 5: Solve for x
    x = 68,110,370,187.12/355,416.09
  6. Step 6: Final answer
    x = 191,635.58

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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.