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Finding the Fourth Proportional to 309,906.72, 427,653.36 and 173,927.68

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Solution

The fourth proportional to 309,906.72, 427,653.36 and 173,927.68 is: 240,010.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,906.72 : 427,653.36 = 173,927.68 : x
  2. Step 2: Convert to fraction form
    309,906.72/427,653.36 = 173,927.68/x
  3. Step 3: Cross multiply
    309,906.72x = 427,653.36 × 173,927.68
  4. Step 4: Simplify right side
    309,906.72x = 74,380,756,749.00
  5. Step 5: Solve for x
    x = 74,380,756,749.00/309,906.72
  6. Step 6: Final answer
    x = 240,010.14

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1.5x scale

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.