Home / 1,304.35-1,799.47-911.60

Finding the Fourth Proportional to 1,304.35, 1,799.47 and 911.60

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Solution

The fourth proportional to 1,304.35, 1,799.47 and 911.60 is: 1,257.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,304.35 : 1,799.47 = 911.60 : x
  2. Step 2: Convert to fraction form
    1,304.35/1,799.47 = 911.60/x
  3. Step 3: Cross multiply
    1,304.35x = 1,799.47 × 911.60
  4. Step 4: Simplify right side
    1,304.35x = 1,640,396.85
  5. Step 5: Solve for x
    x = 1,640,396.85/1,304.35
  6. Step 6: Final answer
    x = 1,257.64

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1.5x scale

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.