Home / 305,933.87-421,848.41-209,153.54

Finding the Fourth Proportional to 305,933.87, 421,848.41 and 209,153.54

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Solution

The fourth proportional to 305,933.87, 421,848.41 and 209,153.54 is: 288,399.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,933.87 : 421,848.41 = 209,153.54 : x
  2. Step 2: Convert to fraction form
    305,933.87/421,848.41 = 209,153.54/x
  3. Step 3: Cross multiply
    305,933.87x = 421,848.41 × 209,153.54
  4. Step 4: Simplify right side
    305,933.87x = 88,231,085,139.86
  5. Step 5: Solve for x
    x = 88,231,085,139.86/305,933.87
  6. Step 6: Final answer
    x = 288,399.21

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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.