Home / 1,396.08-1,928.56-1,118.16

Finding the Fourth Proportional to 1,396.08, 1,928.56 and 1,118.16

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Solution

The fourth proportional to 1,396.08, 1,928.56 and 1,118.16 is: 1,544.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.08 : 1,928.56 = 1,118.16 : x
  2. Step 2: Convert to fraction form
    1,396.08/1,928.56 = 1,118.16/x
  3. Step 3: Cross multiply
    1,396.08x = 1,928.56 × 1,118.16
  4. Step 4: Simplify right side
    1,396.08x = 2,156,438.65
  5. Step 5: Solve for x
    x = 2,156,438.65/1,396.08
  6. Step 6: Final answer
    x = 1,544.64

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1.5x scale

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.