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Finding the Fourth Proportional to 954.26, 1,431.92 and 515.50

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Solution

The fourth proportional to 954.26, 1,431.92 and 515.50 is: 773.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.26 : 1,431.92 = 515.50 : x
  2. Step 2: Convert to fraction form
    954.26/1,431.92 = 515.50/x
  3. Step 3: Cross multiply
    954.26x = 1,431.92 × 515.50
  4. Step 4: Simplify right side
    954.26x = 738,148.60
  5. Step 5: Solve for x
    x = 738,148.60/954.26
  6. Step 6: Final answer
    x = 773.53

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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.