Home / 1,116.06-1,680.23-986.77

Finding the Fourth Proportional to 1,116.06, 1,680.23 and 986.77

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Solution

The fourth proportional to 1,116.06, 1,680.23 and 986.77 is: 1,485.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.06 : 1,680.23 = 986.77 : x
  2. Step 2: Convert to fraction form
    1,116.06/1,680.23 = 986.77/x
  3. Step 3: Cross multiply
    1,116.06x = 1,680.23 × 986.77
  4. Step 4: Simplify right side
    1,116.06x = 1,658,000.56
  5. Step 5: Solve for x
    x = 1,658,000.56/1,116.06
  6. Step 6: Final answer
    x = 1,485.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.