Home / 1,380,679.97-2,071,139.66-421,351.57

Finding the Fourth Proportional to 1,380,679.97, 2,071,139.66 and 421,351.57

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Solution

The fourth proportional to 1,380,679.97, 2,071,139.66 and 421,351.57 is: 632,063.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,679.97 : 2,071,139.66 = 421,351.57 : x
  2. Step 2: Convert to fraction form
    1,380,679.97/2,071,139.66 = 421,351.57/x
  3. Step 3: Cross multiply
    1,380,679.97x = 2,071,139.66 × 421,351.57
  4. Step 4: Simplify right side
    1,380,679.97x = 872,677,949,492.50
  5. Step 5: Solve for x
    x = 872,677,949,492.50/1,380,679.97
  6. Step 6: Final answer
    x = 632,063.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.