Home / 1,571.13-2,167.20-1,129.63

Finding the Fourth Proportional to 1,571.13, 2,167.20 and 1,129.63

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Solution

The fourth proportional to 1,571.13, 2,167.20 and 1,129.63 is: 1,558.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.13 : 2,167.20 = 1,129.63 : x
  2. Step 2: Convert to fraction form
    1,571.13/2,167.20 = 1,129.63/x
  3. Step 3: Cross multiply
    1,571.13x = 2,167.20 × 1,129.63
  4. Step 4: Simplify right side
    1,571.13x = 2,448,134.14
  5. Step 5: Solve for x
    x = 2,448,134.14/1,571.13
  6. Step 6: Final answer
    x = 1,558.20

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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.