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Finding the Fourth Proportional to 308,751.75, 426,047.85 and 172,778.67

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Solution

The fourth proportional to 308,751.75, 426,047.85 and 172,778.67 is: 238,418.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,751.75 : 426,047.85 = 172,778.67 : x
  2. Step 2: Convert to fraction form
    308,751.75/426,047.85 = 172,778.67/x
  3. Step 3: Cross multiply
    308,751.75x = 426,047.85 × 172,778.67
  4. Step 4: Simplify right side
    308,751.75x = 73,611,980,879.36
  5. Step 5: Solve for x
    x = 73,611,980,879.36/308,751.75
  6. Step 6: Final answer
    x = 238,418.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.