Home / 1,290,087.63-1,780,211.40-709,279.38

Finding the Fourth Proportional to 1,290,087.63, 1,780,211.40 and 709,279.38

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Solution

The fourth proportional to 1,290,087.63, 1,780,211.40 and 709,279.38 is: 978,745.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,087.63 : 1,780,211.40 = 709,279.38 : x
  2. Step 2: Convert to fraction form
    1,290,087.63/1,780,211.40 = 709,279.38/x
  3. Step 3: Cross multiply
    1,290,087.63x = 1,780,211.40 × 709,279.38
  4. Step 4: Simplify right side
    1,290,087.63x = 1,262,667,238,060.93
  5. Step 5: Solve for x
    x = 1,262,667,238,060.93/1,290,087.63
  6. Step 6: Final answer
    x = 978,745.33

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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.