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Finding the Fourth Proportional to 675, 1,010.91 and 345.42

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Solution

The fourth proportional to 675, 1,010.91 and 345.42 is: 517.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    675 : 1,010.91 = 345.42 : x
  2. Step 2: Convert to fraction form
    675/1,010.91 = 345.42/x
  3. Step 3: Cross multiply
    675x = 1,010.91 × 345.42
  4. Step 4: Simplify right side
    675x = 349,188.53
  5. Step 5: Solve for x
    x = 349,188.53/675
  6. Step 6: Final answer
    x = 517.32

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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.