Home / 2,988.05-4,123.55-1,643.73

Finding the Fourth Proportional to 2,988.05, 4,123.55 and 1,643.73

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Solution

The fourth proportional to 2,988.05, 4,123.55 and 1,643.73 is: 2,268.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.05 : 4,123.55 = 1,643.73 : x
  2. Step 2: Convert to fraction form
    2,988.05/4,123.55 = 1,643.73/x
  3. Step 3: Cross multiply
    2,988.05x = 4,123.55 × 1,643.73
  4. Step 4: Simplify right side
    2,988.05x = 6,777,994.62
  5. Step 5: Solve for x
    x = 6,777,994.62/2,988.05
  6. Step 6: Final answer
    x = 2,268.37

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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.