Home / 1,231.93-1,701.21-986.50

Finding the Fourth Proportional to 1,231.93, 1,701.21 and 986.50

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Solution

The fourth proportional to 1,231.93, 1,701.21 and 986.50 is: 1,362.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.93 : 1,701.21 = 986.50 : x
  2. Step 2: Convert to fraction form
    1,231.93/1,701.21 = 986.50/x
  3. Step 3: Cross multiply
    1,231.93x = 1,701.21 × 986.50
  4. Step 4: Simplify right side
    1,231.93x = 1,678,243.67
  5. Step 5: Solve for x
    x = 1,678,243.67/1,231.93
  6. Step 6: Final answer
    x = 1,362.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.