Home / 1,772.20-2,445.75-986.30

Finding the Fourth Proportional to 1,772.20, 2,445.75 and 986.30

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Solution

The fourth proportional to 1,772.20, 2,445.75 and 986.30 is: 1,361.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,772.20 : 2,445.75 = 986.30 : x
  2. Step 2: Convert to fraction form
    1,772.20/2,445.75 = 986.30/x
  3. Step 3: Cross multiply
    1,772.20x = 2,445.75 × 986.30
  4. Step 4: Simplify right side
    1,772.20x = 2,412,243.23
  5. Step 5: Solve for x
    x = 2,412,243.23/1,772.20
  6. Step 6: Final answer
    x = 1,361.16

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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.