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Finding the Fourth Proportional to 673.78, 1,010.76 and 240.79

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Solution

The fourth proportional to 673.78, 1,010.76 and 240.79 is: 361.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.78 : 1,010.76 = 240.79 : x
  2. Step 2: Convert to fraction form
    673.78/1,010.76 = 240.79/x
  3. Step 3: Cross multiply
    673.78x = 1,010.76 × 240.79
  4. Step 4: Simplify right side
    673.78x = 243,380.90
  5. Step 5: Solve for x
    x = 243,380.90/673.78
  6. Step 6: Final answer
    x = 361.22

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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.