Home / 1,970.64-2,719.19-1,131.37

Finding the Fourth Proportional to 1,970.64, 2,719.19 and 1,131.37

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Solution

The fourth proportional to 1,970.64, 2,719.19 and 1,131.37 is: 1,561.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,970.64 : 2,719.19 = 1,131.37 : x
  2. Step 2: Convert to fraction form
    1,970.64/2,719.19 = 1,131.37/x
  3. Step 3: Cross multiply
    1,970.64x = 2,719.19 × 1,131.37
  4. Step 4: Simplify right side
    1,970.64x = 3,076,419.25
  5. Step 5: Solve for x
    x = 3,076,419.25/1,970.64
  6. Step 6: Final answer
    x = 1,561.13

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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.