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Finding the Fourth Proportional to 3,078.62, 4,617.90 and 887.36

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Solution

The fourth proportional to 3,078.62, 4,617.90 and 887.36 is: 1,331.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.62 : 4,617.90 = 887.36 : x
  2. Step 2: Convert to fraction form
    3,078.62/4,617.90 = 887.36/x
  3. Step 3: Cross multiply
    3,078.62x = 4,617.90 × 887.36
  4. Step 4: Simplify right side
    3,078.62x = 4,097,739.74
  5. Step 5: Solve for x
    x = 4,097,739.74/3,078.62
  6. Step 6: Final answer
    x = 1,331.03

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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.