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Finding the Fourth Proportional to 3,213.39, 4,820.48 and 904.89

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Solution

The fourth proportional to 3,213.39, 4,820.48 and 904.89 is: 1,357.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,213.39 : 4,820.48 = 904.89 : x
  2. Step 2: Convert to fraction form
    3,213.39/4,820.48 = 904.89/x
  3. Step 3: Cross multiply
    3,213.39x = 4,820.48 × 904.89
  4. Step 4: Simplify right side
    3,213.39x = 4,361,999.62
  5. Step 5: Solve for x
    x = 4,361,999.62/3,213.39
  6. Step 6: Final answer
    x = 1,357.44

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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.