Home / 1,259,620-1,889,431.38-312,990.72

Finding the Fourth Proportional to 1,259,620, 1,889,431.38 and 312,990.72

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Solution

The fourth proportional to 1,259,620, 1,889,431.38 and 312,990.72 is: 469,486.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259,620 : 1,889,431.38 = 312,990.72 : x
  2. Step 2: Convert to fraction form
    1,259,620/1,889,431.38 = 312,990.72/x
  3. Step 3: Cross multiply
    1,259,620x = 1,889,431.38 × 312,990.72
  4. Step 4: Simplify right side
    1,259,620x = 591,374,488,016.79
  5. Step 5: Solve for x
    x = 591,374,488,016.79/1,259,620
  6. Step 6: Final answer
    x = 469,486.42

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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.