Home / 1,485.36-2,048.40-961.20

Finding the Fourth Proportional to 1,485.36, 2,048.40 and 961.20

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Solution

The fourth proportional to 1,485.36, 2,048.40 and 961.20 is: 1,325.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.36 : 2,048.40 = 961.20 : x
  2. Step 2: Convert to fraction form
    1,485.36/2,048.40 = 961.20/x
  3. Step 3: Cross multiply
    1,485.36x = 2,048.40 × 961.20
  4. Step 4: Simplify right side
    1,485.36x = 1,968,922.08
  5. Step 5: Solve for x
    x = 1,968,922.08/1,485.36
  6. Step 6: Final answer
    x = 1,325.55

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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.