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Finding the Fourth Proportional to 2,208.68, 3,312.22 and 648.29

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Solution

The fourth proportional to 2,208.68, 3,312.22 and 648.29 is: 972.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,208.68 : 3,312.22 = 648.29 : x
  2. Step 2: Convert to fraction form
    2,208.68/3,312.22 = 648.29/x
  3. Step 3: Cross multiply
    2,208.68x = 3,312.22 × 648.29
  4. Step 4: Simplify right side
    2,208.68x = 2,147,263.44
  5. Step 5: Solve for x
    x = 2,147,263.44/2,208.68
  6. Step 6: Final answer
    x = 972.19

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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.