Home / 1,772.19-2,445.80-986.31

Finding the Fourth Proportional to 1,772.19, 2,445.80 and 986.31

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Solution

The fourth proportional to 1,772.19, 2,445.80 and 986.31 is: 1,361.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,772.19 : 2,445.80 = 986.31 : x
  2. Step 2: Convert to fraction form
    1,772.19/2,445.80 = 986.31/x
  3. Step 3: Cross multiply
    1,772.19x = 2,445.80 × 986.31
  4. Step 4: Simplify right side
    1,772.19x = 2,412,317.00
  5. Step 5: Solve for x
    x = 2,412,317.00/1,772.19
  6. Step 6: Final answer
    x = 1,361.21

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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.