Home / 1,391,249.32-1,919,906.21-779,390.98

Finding the Fourth Proportional to 1,391,249.32, 1,919,906.21 and 779,390.98

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Solution

The fourth proportional to 1,391,249.32, 1,919,906.21 and 779,390.98 is: 1,075,549.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,249.32 : 1,919,906.21 = 779,390.98 : x
  2. Step 2: Convert to fraction form
    1,391,249.32/1,919,906.21 = 779,390.98/x
  3. Step 3: Cross multiply
    1,391,249.32x = 1,919,906.21 × 779,390.98
  4. Step 4: Simplify right side
    1,391,249.32x = 1,496,357,579,668.70
  5. Step 5: Solve for x
    x = 1,496,357,579,668.70/1,391,249.32
  6. Step 6: Final answer
    x = 1,075,549.55

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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.