Home / 1,556.22-2,334.69-690.78

Finding the Fourth Proportional to 1,556.22, 2,334.69 and 690.78

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Solution

The fourth proportional to 1,556.22, 2,334.69 and 690.78 is: 1,036.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.22 : 2,334.69 = 690.78 : x
  2. Step 2: Convert to fraction form
    1,556.22/2,334.69 = 690.78/x
  3. Step 3: Cross multiply
    1,556.22x = 2,334.69 × 690.78
  4. Step 4: Simplify right side
    1,556.22x = 1,612,757.16
  5. Step 5: Solve for x
    x = 1,612,757.16/1,556.22
  6. Step 6: Final answer
    x = 1,036.33

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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.