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Finding the Fourth Proportional to 1,680.68, 2,321.78 and 1,241.00

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Solution

The fourth proportional to 1,680.68, 2,321.78 and 1,241.00 is: 1,714.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.68 : 2,321.78 = 1,241.00 : x
  2. Step 2: Convert to fraction form
    1,680.68/2,321.78 = 1,241.00/x
  3. Step 3: Cross multiply
    1,680.68x = 2,321.78 × 1,241.00
  4. Step 4: Simplify right side
    1,680.68x = 2,881,311.17
  5. Step 5: Solve for x
    x = 2,881,311.17/1,680.68
  6. Step 6: Final answer
    x = 1,714.38

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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.