Home / 1,931.31-2,891.70-1,438.02

Finding the Fourth Proportional to 1,931.31, 2,891.70 and 1,438.02

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Solution

The fourth proportional to 1,931.31, 2,891.70 and 1,438.02 is: 2,153.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931.31 : 2,891.70 = 1,438.02 : x
  2. Step 2: Convert to fraction form
    1,931.31/2,891.70 = 1,438.02/x
  3. Step 3: Cross multiply
    1,931.31x = 2,891.70 × 1,438.02
  4. Step 4: Simplify right side
    1,931.31x = 4,158,322.43
  5. Step 5: Solve for x
    x = 4,158,322.43/1,931.31
  6. Step 6: Final answer
    x = 2,153.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.