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Finding the Fourth Proportional to 958.31, 1,437.47 and 274.31

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Solution

The fourth proportional to 958.31, 1,437.47 and 274.31 is: 411.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.31 : 1,437.47 = 274.31 : x
  2. Step 2: Convert to fraction form
    958.31/1,437.47 = 274.31/x
  3. Step 3: Cross multiply
    958.31x = 1,437.47 × 274.31
  4. Step 4: Simplify right side
    958.31x = 394,316.68
  5. Step 5: Solve for x
    x = 394,316.68/958.31
  6. Step 6: Final answer
    x = 411.47

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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.