Home / 1,112.85-1,669.23-343.35

Finding the Fourth Proportional to 1,112.85, 1,669.23 and 343.35

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Solution

The fourth proportional to 1,112.85, 1,669.23 and 343.35 is: 515.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.85 : 1,669.23 = 343.35 : x
  2. Step 2: Convert to fraction form
    1,112.85/1,669.23 = 343.35/x
  3. Step 3: Cross multiply
    1,112.85x = 1,669.23 × 343.35
  4. Step 4: Simplify right side
    1,112.85x = 573,130.12
  5. Step 5: Solve for x
    x = 573,130.12/1,112.85
  6. Step 6: Final answer
    x = 515.01

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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.