Home / 1,890.21-2,606.76-1,251.89

Finding the Fourth Proportional to 1,890.21, 2,606.76 and 1,251.89

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Solution

The fourth proportional to 1,890.21, 2,606.76 and 1,251.89 is: 1,726.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.21 : 2,606.76 = 1,251.89 : x
  2. Step 2: Convert to fraction form
    1,890.21/2,606.76 = 1,251.89/x
  3. Step 3: Cross multiply
    1,890.21x = 2,606.76 × 1,251.89
  4. Step 4: Simplify right side
    1,890.21x = 3,263,363.74
  5. Step 5: Solve for x
    x = 3,263,363.74/1,890.21
  6. Step 6: Final answer
    x = 1,726.46

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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.