Home / 1,394.08-1,928.01-1,219.12

Finding the Fourth Proportional to 1,394.08, 1,928.01 and 1,219.12

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Solution

The fourth proportional to 1,394.08, 1,928.01 and 1,219.12 is: 1,686.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.08 : 1,928.01 = 1,219.12 : x
  2. Step 2: Convert to fraction form
    1,394.08/1,928.01 = 1,219.12/x
  3. Step 3: Cross multiply
    1,394.08x = 1,928.01 × 1,219.12
  4. Step 4: Simplify right side
    1,394.08x = 2,350,475.55
  5. Step 5: Solve for x
    x = 2,350,475.55/1,394.08
  6. Step 6: Final answer
    x = 1,686.04

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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.