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Finding the Fourth Proportional to 2,812.60, 4,219.04 and 864.84

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Solution

The fourth proportional to 2,812.60, 4,219.04 and 864.84 is: 1,297.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.60 : 4,219.04 = 864.84 : x
  2. Step 2: Convert to fraction form
    2,812.60/4,219.04 = 864.84/x
  3. Step 3: Cross multiply
    2,812.60x = 4,219.04 × 864.84
  4. Step 4: Simplify right side
    2,812.60x = 3,648,794.55
  5. Step 5: Solve for x
    x = 3,648,794.55/2,812.60
  6. Step 6: Final answer
    x = 1,297.30

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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.