Home / 1,412.09-2,115.84-1,256.30

Finding the Fourth Proportional to 1,412.09, 2,115.84 and 1,256.30

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Solution

The fourth proportional to 1,412.09, 2,115.84 and 1,256.30 is: 1,882.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.09 : 2,115.84 = 1,256.30 : x
  2. Step 2: Convert to fraction form
    1,412.09/2,115.84 = 1,256.30/x
  3. Step 3: Cross multiply
    1,412.09x = 2,115.84 × 1,256.30
  4. Step 4: Simplify right side
    1,412.09x = 2,658,129.79
  5. Step 5: Solve for x
    x = 2,658,129.79/1,412.09
  6. Step 6: Final answer
    x = 1,882.41

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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.