Home / 2,213.78-3,317.70-1,118.93

Finding the Fourth Proportional to 2,213.78, 3,317.70 and 1,118.93

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Solution

The fourth proportional to 2,213.78, 3,317.70 and 1,118.93 is: 1,676.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.78 : 3,317.70 = 1,118.93 : x
  2. Step 2: Convert to fraction form
    2,213.78/3,317.70 = 1,118.93/x
  3. Step 3: Cross multiply
    2,213.78x = 3,317.70 × 1,118.93
  4. Step 4: Simplify right side
    2,213.78x = 3,712,274.06
  5. Step 5: Solve for x
    x = 3,712,274.06/2,213.78
  6. Step 6: Final answer
    x = 1,676.89

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1.5x scale

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.