Home / 1,260.32-1,739.72-1,129.08

Finding the Fourth Proportional to 1,260.32, 1,739.72 and 1,129.08

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Solution

The fourth proportional to 1,260.32, 1,739.72 and 1,129.08 is: 1,558.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.32 : 1,739.72 = 1,129.08 : x
  2. Step 2: Convert to fraction form
    1,260.32/1,739.72 = 1,129.08/x
  3. Step 3: Cross multiply
    1,260.32x = 1,739.72 × 1,129.08
  4. Step 4: Simplify right side
    1,260.32x = 1,964,283.06
  5. Step 5: Solve for x
    x = 1,964,283.06/1,260.32
  6. Step 6: Final answer
    x = 1,558.56

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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.