Home / 1,281,112.74-1,921,748.36-428,261.13

Finding the Fourth Proportional to 1,281,112.74, 1,921,748.36 and 428,261.13

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Solution

The fourth proportional to 1,281,112.74, 1,921,748.36 and 428,261.13 is: 642,418.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281,112.74 : 1,921,748.36 = 428,261.13 : x
  2. Step 2: Convert to fraction form
    1,281,112.74/1,921,748.36 = 428,261.13/x
  3. Step 3: Cross multiply
    1,281,112.74x = 1,921,748.36 × 428,261.13
  4. Step 4: Simplify right side
    1,281,112.74x = 823,010,122,087.94
  5. Step 5: Solve for x
    x = 823,010,122,087.94/1,281,112.74
  6. Step 6: Final answer
    x = 642,418.19

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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.