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Finding the Fourth Proportional to 1,242.11, 1,714.49 and 849.12

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Solution

The fourth proportional to 1,242.11, 1,714.49 and 849.12 is: 1,172.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.11 : 1,714.49 = 849.12 : x
  2. Step 2: Convert to fraction form
    1,242.11/1,714.49 = 849.12/x
  3. Step 3: Cross multiply
    1,242.11x = 1,714.49 × 849.12
  4. Step 4: Simplify right side
    1,242.11x = 1,455,803.50
  5. Step 5: Solve for x
    x = 1,455,803.50/1,242.11
  6. Step 6: Final answer
    x = 1,172.05

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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.