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Finding the Fourth Proportional to 955.40, 1,433.10 and 945.80

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Solution

The fourth proportional to 955.40, 1,433.10 and 945.80 is: 1,418.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.40 : 1,433.10 = 945.80 : x
  2. Step 2: Convert to fraction form
    955.40/1,433.10 = 945.80/x
  3. Step 3: Cross multiply
    955.40x = 1,433.10 × 945.80
  4. Step 4: Simplify right side
    955.40x = 1,355,425.98
  5. Step 5: Solve for x
    x = 1,355,425.98/955.40
  6. Step 6: Final answer
    x = 1,418.70

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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.