Home / 2,877.79-3,971.37-1,618.90

Finding the Fourth Proportional to 2,877.79, 3,971.37 and 1,618.90

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Solution

The fourth proportional to 2,877.79, 3,971.37 and 1,618.90 is: 2,234.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,877.79 : 3,971.37 = 1,618.90 : x
  2. Step 2: Convert to fraction form
    2,877.79/3,971.37 = 1,618.90/x
  3. Step 3: Cross multiply
    2,877.79x = 3,971.37 × 1,618.90
  4. Step 4: Simplify right side
    2,877.79x = 6,429,250.89
  5. Step 5: Solve for x
    x = 6,429,250.89/2,877.79
  6. Step 6: Final answer
    x = 2,234.09

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1.5x scale

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.