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Finding the Fourth Proportional to 308,974.85, 426,388.70 and 171,155.89

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Solution

The fourth proportional to 308,974.85, 426,388.70 and 171,155.89 is: 236,197.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,974.85 : 426,388.70 = 171,155.89 : x
  2. Step 2: Convert to fraction form
    308,974.85/426,388.70 = 171,155.89/x
  3. Step 3: Cross multiply
    308,974.85x = 426,388.70 × 171,155.89
  4. Step 4: Simplify right side
    308,974.85x = 72,978,937,543.29
  5. Step 5: Solve for x
    x = 72,978,937,543.29/308,974.85
  6. Step 6: Final answer
    x = 236,197.01

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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.