Home / 1,970.09-2,719.81-1,438.44

Finding the Fourth Proportional to 1,970.09, 2,719.81 and 1,438.44

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Solution

The fourth proportional to 1,970.09, 2,719.81 and 1,438.44 is: 1,985.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,970.09 : 2,719.81 = 1,438.44 : x
  2. Step 2: Convert to fraction form
    1,970.09/2,719.81 = 1,438.44/x
  3. Step 3: Cross multiply
    1,970.09x = 2,719.81 × 1,438.44
  4. Step 4: Simplify right side
    1,970.09x = 3,912,275.10
  5. Step 5: Solve for x
    x = 3,912,275.10/1,970.09
  6. Step 6: Final answer
    x = 1,985.84

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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.