Home / 1,391,138.28-1,919,842.74-779,255.28

Finding the Fourth Proportional to 1,391,138.28, 1,919,842.74 and 779,255.28

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Solution

The fourth proportional to 1,391,138.28, 1,919,842.74 and 779,255.28 is: 1,075,412.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,138.28 : 1,919,842.74 = 779,255.28 : x
  2. Step 2: Convert to fraction form
    1,391,138.28/1,919,842.74 = 779,255.28/x
  3. Step 3: Cross multiply
    1,391,138.28x = 1,919,842.74 × 779,255.28
  4. Step 4: Simplify right side
    1,391,138.28x = 1,496,047,591,914.67
  5. Step 5: Solve for x
    x = 1,496,047,591,914.67/1,391,138.28
  6. Step 6: Final answer
    x = 1,075,412.57

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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.