Home / 1,284.20-1,760.64-1,260.84

Finding the Fourth Proportional to 1,284.20, 1,760.64 and 1,260.84

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Solution

The fourth proportional to 1,284.20, 1,760.64 and 1,260.84 is: 1,728.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.20 : 1,760.64 = 1,260.84 : x
  2. Step 2: Convert to fraction form
    1,284.20/1,760.64 = 1,260.84/x
  3. Step 3: Cross multiply
    1,284.20x = 1,760.64 × 1,260.84
  4. Step 4: Simplify right side
    1,284.20x = 2,219,885.34
  5. Step 5: Solve for x
    x = 2,219,885.34/1,284.20
  6. Step 6: Final answer
    x = 1,728.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.