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Finding the Fourth Proportional to 3,860.55, 5,328.63 and 2,289.60

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Solution

The fourth proportional to 3,860.55, 5,328.63 and 2,289.60 is: 3,160.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,860.55 : 5,328.63 = 2,289.60 : x
  2. Step 2: Convert to fraction form
    3,860.55/5,328.63 = 2,289.60/x
  3. Step 3: Cross multiply
    3,860.55x = 5,328.63 × 2,289.60
  4. Step 4: Simplify right side
    3,860.55x = 12,200,431.25
  5. Step 5: Solve for x
    x = 12,200,431.25/3,860.55
  6. Step 6: Final answer
    x = 3,160.28

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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.