Home / 2,647.40-3,654.08-1,861.72

Finding the Fourth Proportional to 2,647.40, 3,654.08 and 1,861.72

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Solution

The fourth proportional to 2,647.40, 3,654.08 and 1,861.72 is: 2,569.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,647.40 : 3,654.08 = 1,861.72 : x
  2. Step 2: Convert to fraction form
    2,647.40/3,654.08 = 1,861.72/x
  3. Step 3: Cross multiply
    2,647.40x = 3,654.08 × 1,861.72
  4. Step 4: Simplify right side
    2,647.40x = 6,802,873.82
  5. Step 5: Solve for x
    x = 6,802,873.82/2,647.40
  6. Step 6: Final answer
    x = 2,569.64

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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.