Home / 1,620.54-2,236.35-921.91

Finding the Fourth Proportional to 1,620.54, 2,236.35 and 921.91

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Solution

The fourth proportional to 1,620.54, 2,236.35 and 921.91 is: 1,272.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.54 : 2,236.35 = 921.91 : x
  2. Step 2: Convert to fraction form
    1,620.54/2,236.35 = 921.91/x
  3. Step 3: Cross multiply
    1,620.54x = 2,236.35 × 921.91
  4. Step 4: Simplify right side
    1,620.54x = 2,061,719.02
  5. Step 5: Solve for x
    x = 2,061,719.02/1,620.54
  6. Step 6: Final answer
    x = 1,272.24

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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.