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Finding the Fourth Proportional to 356.90, 534.60 and 275.31

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Solution

The fourth proportional to 356.90, 534.60 and 275.31 is: 412.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.90 : 534.60 = 275.31 : x
  2. Step 2: Convert to fraction form
    356.90/534.60 = 275.31/x
  3. Step 3: Cross multiply
    356.90x = 534.60 × 275.31
  4. Step 4: Simplify right side
    356.90x = 147,180.73
  5. Step 5: Solve for x
    x = 147,180.73/356.90
  6. Step 6: Final answer
    x = 412.39

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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.