Home / 1,077.42-1,485.60-936.26

Finding the Fourth Proportional to 1,077.42, 1,485.60 and 936.26

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Solution

The fourth proportional to 1,077.42, 1,485.60 and 936.26 is: 1,290.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,077.42 : 1,485.60 = 936.26 : x
  2. Step 2: Convert to fraction form
    1,077.42/1,485.60 = 936.26/x
  3. Step 3: Cross multiply
    1,077.42x = 1,485.60 × 936.26
  4. Step 4: Simplify right side
    1,077.42x = 1,390,907.86
  5. Step 5: Solve for x
    x = 1,390,907.86/1,077.42
  6. Step 6: Final answer
    x = 1,290.96

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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.