Home / 305,786.21-421,999.08-169,820.75

Finding the Fourth Proportional to 305,786.21, 421,999.08 and 169,820.75

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Solution

The fourth proportional to 305,786.21, 421,999.08 and 169,820.75 is: 234,360.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,786.21 : 421,999.08 = 169,820.75 : x
  2. Step 2: Convert to fraction form
    305,786.21/421,999.08 = 169,820.75/x
  3. Step 3: Cross multiply
    305,786.21x = 421,999.08 × 169,820.75
  4. Step 4: Simplify right side
    305,786.21x = 71,664,200,264.91
  5. Step 5: Solve for x
    x = 71,664,200,264.91/305,786.21
  6. Step 6: Final answer
    x = 234,360.47

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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.