Home / 1,231.16-1,846.75-386.86

Finding the Fourth Proportional to 1,231.16, 1,846.75 and 386.86

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Solution

The fourth proportional to 1,231.16, 1,846.75 and 386.86 is: 580.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.16 : 1,846.75 = 386.86 : x
  2. Step 2: Convert to fraction form
    1,231.16/1,846.75 = 386.86/x
  3. Step 3: Cross multiply
    1,231.16x = 1,846.75 × 386.86
  4. Step 4: Simplify right side
    1,231.16x = 714,433.71
  5. Step 5: Solve for x
    x = 714,433.71/1,231.16
  6. Step 6: Final answer
    x = 580.29

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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.