Home / 2,129.49-2,938.88-1,245.58

Finding the Fourth Proportional to 2,129.49, 2,938.88 and 1,245.58

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Solution

The fourth proportional to 2,129.49, 2,938.88 and 1,245.58 is: 1,719.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.49 : 2,938.88 = 1,245.58 : x
  2. Step 2: Convert to fraction form
    2,129.49/2,938.88 = 1,245.58/x
  3. Step 3: Cross multiply
    2,129.49x = 2,938.88 × 1,245.58
  4. Step 4: Simplify right side
    2,129.49x = 3,660,610.15
  5. Step 5: Solve for x
    x = 3,660,610.15/2,129.49
  6. Step 6: Final answer
    x = 1,719.01

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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.