Home / 2,129.06-2,938.12-1,245.47

Finding the Fourth Proportional to 2,129.06, 2,938.12 and 1,245.47

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Solution

The fourth proportional to 2,129.06, 2,938.12 and 1,245.47 is: 1,718.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.06 : 2,938.12 = 1,245.47 : x
  2. Step 2: Convert to fraction form
    2,129.06/2,938.12 = 1,245.47/x
  3. Step 3: Cross multiply
    2,129.06x = 2,938.12 × 1,245.47
  4. Step 4: Simplify right side
    2,129.06x = 3,659,322.51
  5. Step 5: Solve for x
    x = 3,659,322.51/2,129.06
  6. Step 6: Final answer
    x = 1,718.75

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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.