Home / 1,561.51-2,157.74-1,485.58

Finding the Fourth Proportional to 1,561.51, 2,157.74 and 1,485.58

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Solution

The fourth proportional to 1,561.51, 2,157.74 and 1,485.58 is: 2,052.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.51 : 2,157.74 = 1,485.58 : x
  2. Step 2: Convert to fraction form
    1,561.51/2,157.74 = 1,485.58/x
  3. Step 3: Cross multiply
    1,561.51x = 2,157.74 × 1,485.58
  4. Step 4: Simplify right side
    1,561.51x = 3,205,487.96
  5. Step 5: Solve for x
    x = 3,205,487.96/1,561.51
  6. Step 6: Final answer
    x = 2,052.81

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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.