Home / 1,485.09-2,049.35-821.93

Finding the Fourth Proportional to 1,485.09, 2,049.35 and 821.93

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Solution

The fourth proportional to 1,485.09, 2,049.35 and 821.93 is: 1,134.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.09 : 2,049.35 = 821.93 : x
  2. Step 2: Convert to fraction form
    1,485.09/2,049.35 = 821.93/x
  3. Step 3: Cross multiply
    1,485.09x = 2,049.35 × 821.93
  4. Step 4: Simplify right side
    1,485.09x = 1,684,407.89
  5. Step 5: Solve for x
    x = 1,684,407.89/1,485.09
  6. Step 6: Final answer
    x = 1,134.21

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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.