Home / 1,685.18-2,325.21-986.42

Finding the Fourth Proportional to 1,685.18, 2,325.21 and 986.42

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Solution

The fourth proportional to 1,685.18, 2,325.21 and 986.42 is: 1,361.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.18 : 2,325.21 = 986.42 : x
  2. Step 2: Convert to fraction form
    1,685.18/2,325.21 = 986.42/x
  3. Step 3: Cross multiply
    1,685.18x = 2,325.21 × 986.42
  4. Step 4: Simplify right side
    1,685.18x = 2,293,633.65
  5. Step 5: Solve for x
    x = 2,293,633.65/1,685.18
  6. Step 6: Final answer
    x = 1,361.06

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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.