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Finding the Fourth Proportional to 955.67, 1,433.31 and 339.30

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Solution

The fourth proportional to 955.67, 1,433.31 and 339.30 is: 508.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.67 : 1,433.31 = 339.30 : x
  2. Step 2: Convert to fraction form
    955.67/1,433.31 = 339.30/x
  3. Step 3: Cross multiply
    955.67x = 1,433.31 × 339.30
  4. Step 4: Simplify right side
    955.67x = 486,322.08
  5. Step 5: Solve for x
    x = 486,322.08/955.67
  6. Step 6: Final answer
    x = 508.88

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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.