Home / 1,915.20-2,642.98-1,119.08

Finding the Fourth Proportional to 1,915.20, 2,642.98 and 1,119.08

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Solution

The fourth proportional to 1,915.20, 2,642.98 and 1,119.08 is: 1,544.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.20 : 2,642.98 = 1,119.08 : x
  2. Step 2: Convert to fraction form
    1,915.20/2,642.98 = 1,119.08/x
  3. Step 3: Cross multiply
    1,915.20x = 2,642.98 × 1,119.08
  4. Step 4: Simplify right side
    1,915.20x = 2,957,690.05
  5. Step 5: Solve for x
    x = 2,957,690.05/1,915.20
  6. Step 6: Final answer
    x = 1,544.32

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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.