Home / 305,438.03-421,518.68-190,784.56

Finding the Fourth Proportional to 305,438.03, 421,518.68 and 190,784.56

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Solution

The fourth proportional to 305,438.03, 421,518.68 and 190,784.56 is: 263,291.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,438.03 : 421,518.68 = 190,784.56 : x
  2. Step 2: Convert to fraction form
    305,438.03/421,518.68 = 190,784.56/x
  3. Step 3: Cross multiply
    305,438.03x = 421,518.68 × 190,784.56
  4. Step 4: Simplify right side
    305,438.03x = 80,419,255,318.75
  5. Step 5: Solve for x
    x = 80,419,255,318.75/305,438.03
  6. Step 6: Final answer
    x = 263,291.56

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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.