Home / 2,378.08-3,281.51-1,383.40

Finding the Fourth Proportional to 2,378.08, 3,281.51 and 1,383.40

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Solution

The fourth proportional to 2,378.08, 3,281.51 and 1,383.40 is: 1,908.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,378.08 : 3,281.51 = 1,383.40 : x
  2. Step 2: Convert to fraction form
    2,378.08/3,281.51 = 1,383.40/x
  3. Step 3: Cross multiply
    2,378.08x = 3,281.51 × 1,383.40
  4. Step 4: Simplify right side
    2,378.08x = 4,539,630.04
  5. Step 5: Solve for x
    x = 4,539,630.04/2,378.08
  6. Step 6: Final answer
    x = 1,908.95

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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.