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Finding the Fourth Proportional to 2,213.30, 3,319 and 751.79

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Solution

The fourth proportional to 2,213.30, 3,319 and 751.79 is: 1,127.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.30 : 3,319 = 751.79 : x
  2. Step 2: Convert to fraction form
    2,213.30/3,319 = 751.79/x
  3. Step 3: Cross multiply
    2,213.30x = 3,319 × 751.79
  4. Step 4: Simplify right side
    2,213.30x = 2,495,191.01
  5. Step 5: Solve for x
    x = 2,495,191.01/2,213.30
  6. Step 6: Final answer
    x = 1,127.36

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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.