Home / 1,211,876.82-1,672,389.54-668,021.63

Finding the Fourth Proportional to 1,211,876.82, 1,672,389.54 and 668,021.63

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Solution

The fourth proportional to 1,211,876.82, 1,672,389.54 and 668,021.63 is: 921,869.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,876.82 : 1,672,389.54 = 668,021.63 : x
  2. Step 2: Convert to fraction form
    1,211,876.82/1,672,389.54 = 668,021.63/x
  3. Step 3: Cross multiply
    1,211,876.82x = 1,672,389.54 × 668,021.63
  4. Step 4: Simplify right side
    1,211,876.82x = 1,117,192,378,143.80
  5. Step 5: Solve for x
    x = 1,117,192,378,143.80/1,211,876.82
  6. Step 6: Final answer
    x = 921,869.58

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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.