Home / 1,676.40-2,515.56-1,391.28

Finding the Fourth Proportional to 1,676.40, 2,515.56 and 1,391.28

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Solution

The fourth proportional to 1,676.40, 2,515.56 and 1,391.28 is: 2,087.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,676.40 : 2,515.56 = 1,391.28 : x
  2. Step 2: Convert to fraction form
    1,676.40/2,515.56 = 1,391.28/x
  3. Step 3: Cross multiply
    1,676.40x = 2,515.56 × 1,391.28
  4. Step 4: Simplify right side
    1,676.40x = 3,499,848.32
  5. Step 5: Solve for x
    x = 3,499,848.32/1,676.40
  6. Step 6: Final answer
    x = 2,087.72

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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.