Home / 1,667.45-2,508.12-1,390.65

Finding the Fourth Proportional to 1,667.45, 2,508.12 and 1,390.65

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Solution

The fourth proportional to 1,667.45, 2,508.12 and 1,390.65 is: 2,091.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,667.45 : 2,508.12 = 1,390.65 : x
  2. Step 2: Convert to fraction form
    1,667.45/2,508.12 = 1,390.65/x
  3. Step 3: Cross multiply
    1,667.45x = 2,508.12 × 1,390.65
  4. Step 4: Simplify right side
    1,667.45x = 3,487,917.08
  5. Step 5: Solve for x
    x = 3,487,917.08/1,667.45
  6. Step 6: Final answer
    x = 2,091.77

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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.