Home / 1,285.24-1,773.35-986.83

Finding the Fourth Proportional to 1,285.24, 1,773.35 and 986.83

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Solution

The fourth proportional to 1,285.24, 1,773.35 and 986.83 is: 1,361.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.24 : 1,773.35 = 986.83 : x
  2. Step 2: Convert to fraction form
    1,285.24/1,773.35 = 986.83/x
  3. Step 3: Cross multiply
    1,285.24x = 1,773.35 × 986.83
  4. Step 4: Simplify right side
    1,285.24x = 1,749,994.98
  5. Step 5: Solve for x
    x = 1,749,994.98/1,285.24
  6. Step 6: Final answer
    x = 1,361.61

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1.5x scale

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.