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Finding the Fourth Proportional to 1,242.36, 1,714.48 and 682.84

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Solution

The fourth proportional to 1,242.36, 1,714.48 and 682.84 is: 942.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.36 : 1,714.48 = 682.84 : x
  2. Step 2: Convert to fraction form
    1,242.36/1,714.48 = 682.84/x
  3. Step 3: Cross multiply
    1,242.36x = 1,714.48 × 682.84
  4. Step 4: Simplify right side
    1,242.36x = 1,170,715.52
  5. Step 5: Solve for x
    x = 1,170,715.52/1,242.36
  6. Step 6: Final answer
    x = 942.33

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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.