Home / 2,176.21-3,001.89-1,390.65

Finding the Fourth Proportional to 2,176.21, 3,001.89 and 1,390.65

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Solution

The fourth proportional to 2,176.21, 3,001.89 and 1,390.65 is: 1,918.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,176.21 : 3,001.89 = 1,390.65 : x
  2. Step 2: Convert to fraction form
    2,176.21/3,001.89 = 1,390.65/x
  3. Step 3: Cross multiply
    2,176.21x = 3,001.89 × 1,390.65
  4. Step 4: Simplify right side
    2,176.21x = 4,174,578.33
  5. Step 5: Solve for x
    x = 4,174,578.33/2,176.21
  6. Step 6: Final answer
    x = 1,918.28

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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.