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Finding the Fourth Proportional to 3,078.60, 4,617.96 and 887.34

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Solution

The fourth proportional to 3,078.60, 4,617.96 and 887.34 is: 1,331.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.60 : 4,617.96 = 887.34 : x
  2. Step 2: Convert to fraction form
    3,078.60/4,617.96 = 887.34/x
  3. Step 3: Cross multiply
    3,078.60x = 4,617.96 × 887.34
  4. Step 4: Simplify right side
    3,078.60x = 4,097,700.63
  5. Step 5: Solve for x
    x = 4,097,700.63/3,078.60
  6. Step 6: Final answer
    x = 1,331.03

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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.