Home / 2,118.08-3,177.30-657.56

Finding the Fourth Proportional to 2,118.08, 3,177.30 and 657.56

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Solution

The fourth proportional to 2,118.08, 3,177.30 and 657.56 is: 986.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.08 : 3,177.30 = 657.56 : x
  2. Step 2: Convert to fraction form
    2,118.08/3,177.30 = 657.56/x
  3. Step 3: Cross multiply
    2,118.08x = 3,177.30 × 657.56
  4. Step 4: Simplify right side
    2,118.08x = 2,089,265.39
  5. Step 5: Solve for x
    x = 2,089,265.39/2,118.08
  6. Step 6: Final answer
    x = 986.40

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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.