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Finding the Fourth Proportional to 2,878.60, 4,317.90 and 798.49

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Solution

The fourth proportional to 2,878.60, 4,317.90 and 798.49 is: 1,197.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.60 : 4,317.90 = 798.49 : x
  2. Step 2: Convert to fraction form
    2,878.60/4,317.90 = 798.49/x
  3. Step 3: Cross multiply
    2,878.60x = 4,317.90 × 798.49
  4. Step 4: Simplify right side
    2,878.60x = 3,447,799.97
  5. Step 5: Solve for x
    x = 3,447,799.97/2,878.60
  6. Step 6: Final answer
    x = 1,197.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.