Home / 1,970.75-2,719.53-1,272.12

Finding the Fourth Proportional to 1,970.75, 2,719.53 and 1,272.12

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Solution

The fourth proportional to 1,970.75, 2,719.53 and 1,272.12 is: 1,755.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,970.75 : 2,719.53 = 1,272.12 : x
  2. Step 2: Convert to fraction form
    1,970.75/2,719.53 = 1,272.12/x
  3. Step 3: Cross multiply
    1,970.75x = 2,719.53 × 1,272.12
  4. Step 4: Simplify right side
    1,970.75x = 3,459,568.50
  5. Step 5: Solve for x
    x = 3,459,568.50/1,970.75
  6. Step 6: Final answer
    x = 1,755.46

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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.