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Finding the Fourth Proportional to 1,242.42, 1,714.10 and 745.22

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Solution

The fourth proportional to 1,242.42, 1,714.10 and 745.22 is: 1,028.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.42 : 1,714.10 = 745.22 : x
  2. Step 2: Convert to fraction form
    1,242.42/1,714.10 = 745.22/x
  3. Step 3: Cross multiply
    1,242.42x = 1,714.10 × 745.22
  4. Step 4: Simplify right side
    1,242.42x = 1,277,369.31
  5. Step 5: Solve for x
    x = 1,277,369.31/1,242.42
  6. Step 6: Final answer
    x = 1,028.13

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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.