Home / 1,540.89-2,311.35-386.64

Finding the Fourth Proportional to 1,540.89, 2,311.35 and 386.64

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Solution

The fourth proportional to 1,540.89, 2,311.35 and 386.64 is: 579.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.89 : 2,311.35 = 386.64 : x
  2. Step 2: Convert to fraction form
    1,540.89/2,311.35 = 386.64/x
  3. Step 3: Cross multiply
    1,540.89x = 2,311.35 × 386.64
  4. Step 4: Simplify right side
    1,540.89x = 893,660.36
  5. Step 5: Solve for x
    x = 893,660.36/1,540.89
  6. Step 6: Final answer
    x = 579.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.