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Finding the Fourth Proportional to 1,168.21, 1,612.11 and 637.09

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Solution

The fourth proportional to 1,168.21, 1,612.11 and 637.09 is: 879.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.21 : 1,612.11 = 637.09 : x
  2. Step 2: Convert to fraction form
    1,168.21/1,612.11 = 637.09/x
  3. Step 3: Cross multiply
    1,168.21x = 1,612.11 × 637.09
  4. Step 4: Simplify right side
    1,168.21x = 1,027,063.82
  5. Step 5: Solve for x
    x = 1,027,063.82/1,168.21
  6. Step 6: Final answer
    x = 879.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.