Home / 1,615.48-2,230.25-986.15

Finding the Fourth Proportional to 1,615.48, 2,230.25 and 986.15

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Solution

The fourth proportional to 1,615.48, 2,230.25 and 986.15 is: 1,361.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.48 : 2,230.25 = 986.15 : x
  2. Step 2: Convert to fraction form
    1,615.48/2,230.25 = 986.15/x
  3. Step 3: Cross multiply
    1,615.48x = 2,230.25 × 986.15
  4. Step 4: Simplify right side
    1,615.48x = 2,199,361.68
  5. Step 5: Solve for x
    x = 2,199,361.68/1,615.48
  6. Step 6: Final answer
    x = 1,361.43

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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.