Home / 305,680.10-421,545.39-196,673.19

Finding the Fourth Proportional to 305,680.10, 421,545.39 and 196,673.19

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Solution

The fourth proportional to 305,680.10, 421,545.39 and 196,673.19 is: 271,220.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,680.10 : 421,545.39 = 196,673.19 : x
  2. Step 2: Convert to fraction form
    305,680.10/421,545.39 = 196,673.19/x
  3. Step 3: Cross multiply
    305,680.10x = 421,545.39 × 196,673.19
  4. Step 4: Simplify right side
    305,680.10x = 82,906,676,001.51
  5. Step 5: Solve for x
    x = 82,906,676,001.51/305,680.10
  6. Step 6: Final answer
    x = 271,220.39

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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.