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Finding the Fourth Proportional to 675.47, 1,012.97 and 188.39

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Solution

The fourth proportional to 675.47, 1,012.97 and 188.39 is: 282.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.47 : 1,012.97 = 188.39 : x
  2. Step 2: Convert to fraction form
    675.47/1,012.97 = 188.39/x
  3. Step 3: Cross multiply
    675.47x = 1,012.97 × 188.39
  4. Step 4: Simplify right side
    675.47x = 190,836.42
  5. Step 5: Solve for x
    x = 190,836.42/675.47
  6. Step 6: Final answer
    x = 282.52

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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.