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Finding the Fourth Proportional to 309,864.50, 427,621.48 and 173,906.87

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Solution

The fourth proportional to 309,864.50, 427,621.48 and 173,906.87 is: 239,996.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,864.50 : 427,621.48 = 173,906.87 : x
  2. Step 2: Convert to fraction form
    309,864.50/427,621.48 = 173,906.87/x
  3. Step 3: Cross multiply
    309,864.50x = 427,621.48 × 173,906.87
  4. Step 4: Simplify right side
    309,864.50x = 74,366,312,739.60
  5. Step 5: Solve for x
    x = 74,366,312,739.60/309,864.50
  6. Step 6: Final answer
    x = 239,996.24

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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.