Home / 305,390.12-421,636.29-196,543.22

Finding the Fourth Proportional to 305,390.12, 421,636.29 and 196,543.22

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Solution

The fourth proportional to 305,390.12, 421,636.29 and 196,543.22 is: 271,357.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,390.12 : 421,636.29 = 196,543.22 : x
  2. Step 2: Convert to fraction form
    305,390.12/421,636.29 = 196,543.22/x
  3. Step 3: Cross multiply
    305,390.12x = 421,636.29 × 196,543.22
  4. Step 4: Simplify right side
    305,390.12x = 82,869,754,105.45
  5. Step 5: Solve for x
    x = 82,869,754,105.45/305,390.12
  6. Step 6: Final answer
    x = 271,357.02

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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.