Home / 2,158.08-2,978.40-1,226.64

Finding the Fourth Proportional to 2,158.08, 2,978.40 and 1,226.64

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Solution

The fourth proportional to 2,158.08, 2,978.40 and 1,226.64 is: 1,692.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158.08 : 2,978.40 = 1,226.64 : x
  2. Step 2: Convert to fraction form
    2,158.08/2,978.40 = 1,226.64/x
  3. Step 3: Cross multiply
    2,158.08x = 2,978.40 × 1,226.64
  4. Step 4: Simplify right side
    2,158.08x = 3,653,424.58
  5. Step 5: Solve for x
    x = 3,653,424.58/2,158.08
  6. Step 6: Final answer
    x = 1,692.91

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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.