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Finding the Fourth Proportional to 2,420.05, 3,630.60 and 860.14

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Solution

The fourth proportional to 2,420.05, 3,630.60 and 860.14 is: 1,290.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420.05 : 3,630.60 = 860.14 : x
  2. Step 2: Convert to fraction form
    2,420.05/3,630.60 = 860.14/x
  3. Step 3: Cross multiply
    2,420.05x = 3,630.60 × 860.14
  4. Step 4: Simplify right side
    2,420.05x = 3,122,824.28
  5. Step 5: Solve for x
    x = 3,122,824.28/2,420.05
  6. Step 6: Final answer
    x = 1,290.40

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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.