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Finding the Fourth Proportional to 2,783.39, 3,840.08 and 1,788.30

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Solution

The fourth proportional to 2,783.39, 3,840.08 and 1,788.30 is: 2,467.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,783.39 : 3,840.08 = 1,788.30 : x
  2. Step 2: Convert to fraction form
    2,783.39/3,840.08 = 1,788.30/x
  3. Step 3: Cross multiply
    2,783.39x = 3,840.08 × 1,788.30
  4. Step 4: Simplify right side
    2,783.39x = 6,867,206.12
  5. Step 5: Solve for x
    x = 6,867,206.12/2,783.39
  6. Step 6: Final answer
    x = 2,467.21

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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.