Home / 1,260.45-1,889.40-480.26

Finding the Fourth Proportional to 1,260.45, 1,889.40 and 480.26

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Solution

The fourth proportional to 1,260.45, 1,889.40 and 480.26 is: 719.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.45 : 1,889.40 = 480.26 : x
  2. Step 2: Convert to fraction form
    1,260.45/1,889.40 = 480.26/x
  3. Step 3: Cross multiply
    1,260.45x = 1,889.40 × 480.26
  4. Step 4: Simplify right side
    1,260.45x = 907,393.80
  5. Step 5: Solve for x
    x = 907,393.80/1,260.45
  6. Step 6: Final answer
    x = 719.90

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1.5x scale

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.