Home / 3,087.21-4,631.79-1,111.49

Finding the Fourth Proportional to 3,087.21, 4,631.79 and 1,111.49

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Solution

The fourth proportional to 3,087.21, 4,631.79 and 1,111.49 is: 1,667.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,087.21 : 4,631.79 = 1,111.49 : x
  2. Step 2: Convert to fraction form
    3,087.21/4,631.79 = 1,111.49/x
  3. Step 3: Cross multiply
    3,087.21x = 4,631.79 × 1,111.49
  4. Step 4: Simplify right side
    3,087.21x = 5,148,165.11
  5. Step 5: Solve for x
    x = 5,148,165.11/3,087.21
  6. Step 6: Final answer
    x = 1,667.58

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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.