Home / 1,928.32-2,903.01-1,315.90

Finding the Fourth Proportional to 1,928.32, 2,903.01 and 1,315.90

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Solution

The fourth proportional to 1,928.32, 2,903.01 and 1,315.90 is: 1,981.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.32 : 2,903.01 = 1,315.90 : x
  2. Step 2: Convert to fraction form
    1,928.32/2,903.01 = 1,315.90/x
  3. Step 3: Cross multiply
    1,928.32x = 2,903.01 × 1,315.90
  4. Step 4: Simplify right side
    1,928.32x = 3,820,069.55
  5. Step 5: Solve for x
    x = 3,820,069.55/1,928.32
  6. Step 6: Final answer
    x = 1,981.04

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.