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Finding the Fourth Proportional to 3,214.28, 4,820.94 and 874.42

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Solution

The fourth proportional to 3,214.28, 4,820.94 and 874.42 is: 1,311.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,214.28 : 4,820.94 = 874.42 : x
  2. Step 2: Convert to fraction form
    3,214.28/4,820.94 = 874.42/x
  3. Step 3: Cross multiply
    3,214.28x = 4,820.94 × 874.42
  4. Step 4: Simplify right side
    3,214.28x = 4,215,526.35
  5. Step 5: Solve for x
    x = 4,215,526.35/3,214.28
  6. Step 6: Final answer
    x = 1,311.50

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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.