Home / 1,529.43-2,112.38-1,215.69

Finding the Fourth Proportional to 1,529.43, 2,112.38 and 1,215.69

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Solution

The fourth proportional to 1,529.43, 2,112.38 and 1,215.69 is: 1,679.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,529.43 : 2,112.38 = 1,215.69 : x
  2. Step 2: Convert to fraction form
    1,529.43/2,112.38 = 1,215.69/x
  3. Step 3: Cross multiply
    1,529.43x = 2,112.38 × 1,215.69
  4. Step 4: Simplify right side
    1,529.43x = 2,567,999.24
  5. Step 5: Solve for x
    x = 2,567,999.24/1,529.43
  6. Step 6: Final answer
    x = 1,679.06

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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.