Home / 1,015.26-1,521.30-784.72

Finding the Fourth Proportional to 1,015.26, 1,521.30 and 784.72

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Solution

The fourth proportional to 1,015.26, 1,521.30 and 784.72 is: 1,175.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.26 : 1,521.30 = 784.72 : x
  2. Step 2: Convert to fraction form
    1,015.26/1,521.30 = 784.72/x
  3. Step 3: Cross multiply
    1,015.26x = 1,521.30 × 784.72
  4. Step 4: Simplify right side
    1,015.26x = 1,193,786.41
  5. Step 5: Solve for x
    x = 1,193,786.41/1,015.26
  6. Step 6: Final answer
    x = 1,175.84

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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.