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Finding the Fourth Proportional to 675.90, 1,013.76 and 243

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Solution

The fourth proportional to 675.90, 1,013.76 and 243 is: 364.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.90 : 1,013.76 = 243 : x
  2. Step 2: Convert to fraction form
    675.90/1,013.76 = 243/x
  3. Step 3: Cross multiply
    675.90x = 1,013.76 × 243
  4. Step 4: Simplify right side
    675.90x = 246,343.68
  5. Step 5: Solve for x
    x = 246,343.68/675.90
  6. Step 6: Final answer
    x = 364.47

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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.