Home / 1,014.15-1,521.21-320.79

Finding the Fourth Proportional to 1,014.15, 1,521.21 and 320.79

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Solution

The fourth proportional to 1,014.15, 1,521.21 and 320.79 is: 481.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.15 : 1,521.21 = 320.79 : x
  2. Step 2: Convert to fraction form
    1,014.15/1,521.21 = 320.79/x
  3. Step 3: Cross multiply
    1,014.15x = 1,521.21 × 320.79
  4. Step 4: Simplify right side
    1,014.15x = 487,995.86
  5. Step 5: Solve for x
    x = 487,995.86/1,014.15
  6. Step 6: Final answer
    x = 481.19

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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.