Home / 1,085.80-1,629.15-355.60

Finding the Fourth Proportional to 1,085.80, 1,629.15 and 355.60

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Solution

The fourth proportional to 1,085.80, 1,629.15 and 355.60 is: 533.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085.80 : 1,629.15 = 355.60 : x
  2. Step 2: Convert to fraction form
    1,085.80/1,629.15 = 355.60/x
  3. Step 3: Cross multiply
    1,085.80x = 1,629.15 × 355.60
  4. Step 4: Simplify right side
    1,085.80x = 579,325.74
  5. Step 5: Solve for x
    x = 579,325.74/1,085.80
  6. Step 6: Final answer
    x = 533.55

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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.