Home / 1,391,821.40-1,921,638.66-1,068,954.50

Finding the Fourth Proportional to 1,391,821.40, 1,921,638.66 and 1,068,954.50

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Solution

The fourth proportional to 1,391,821.40, 1,921,638.66 and 1,068,954.50 is: 1,475,867.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,821.40 : 1,921,638.66 = 1,068,954.50 : x
  2. Step 2: Convert to fraction form
    1,391,821.40/1,921,638.66 = 1,068,954.50/x
  3. Step 3: Cross multiply
    1,391,821.40x = 1,921,638.66 × 1,068,954.50
  4. Step 4: Simplify right side
    1,391,821.40x = 2,054,144,292,980.97
  5. Step 5: Solve for x
    x = 2,054,144,292,980.97/1,391,821.40
  6. Step 6: Final answer
    x = 1,475,867.73

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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.