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Finding the Fourth Proportional to 955.96, 1,431.51 and 630.34

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Solution

The fourth proportional to 955.96, 1,431.51 and 630.34 is: 943.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.96 : 1,431.51 = 630.34 : x
  2. Step 2: Convert to fraction form
    955.96/1,431.51 = 630.34/x
  3. Step 3: Cross multiply
    955.96x = 1,431.51 × 630.34
  4. Step 4: Simplify right side
    955.96x = 902,338.01
  5. Step 5: Solve for x
    x = 902,338.01/955.96
  6. Step 6: Final answer
    x = 943.91

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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.