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Finding the Fourth Proportional to 1,142.84, 1,714.82 and 412.48

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Solution

The fourth proportional to 1,142.84, 1,714.82 and 412.48 is: 618.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,142.84 : 1,714.82 = 412.48 : x
  2. Step 2: Convert to fraction form
    1,142.84/1,714.82 = 412.48/x
  3. Step 3: Cross multiply
    1,142.84x = 1,714.82 × 412.48
  4. Step 4: Simplify right side
    1,142.84x = 707,328.95
  5. Step 5: Solve for x
    x = 707,328.95/1,142.84
  6. Step 6: Final answer
    x = 618.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.