Home / 1,968.57-2,948.81-1,421.85

Finding the Fourth Proportional to 1,968.57, 2,948.81 and 1,421.85

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Solution

The fourth proportional to 1,968.57, 2,948.81 and 1,421.85 is: 2,129.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,968.57 : 2,948.81 = 1,421.85 : x
  2. Step 2: Convert to fraction form
    1,968.57/2,948.81 = 1,421.85/x
  3. Step 3: Cross multiply
    1,968.57x = 2,948.81 × 1,421.85
  4. Step 4: Simplify right side
    1,968.57x = 4,192,758.39
  5. Step 5: Solve for x
    x = 4,192,758.39/1,968.57
  6. Step 6: Final answer
    x = 2,129.85

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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.