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Finding the Fourth Proportional to 2,798.40, 3,858.63 and 1,788.75

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Solution

The fourth proportional to 2,798.40, 3,858.63 and 1,788.75 is: 2,466.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,798.40 : 3,858.63 = 1,788.75 : x
  2. Step 2: Convert to fraction form
    2,798.40/3,858.63 = 1,788.75/x
  3. Step 3: Cross multiply
    2,798.40x = 3,858.63 × 1,788.75
  4. Step 4: Simplify right side
    2,798.40x = 6,902,124.41
  5. Step 5: Solve for x
    x = 6,902,124.41/2,798.40
  6. Step 6: Final answer
    x = 2,466.45

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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.