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Finding the Fourth Proportional to 955.40, 1,431.72 and 735.17

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Solution

The fourth proportional to 955.40, 1,431.72 and 735.17 is: 1,101.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.40 : 1,431.72 = 735.17 : x
  2. Step 2: Convert to fraction form
    955.40/1,431.72 = 735.17/x
  3. Step 3: Cross multiply
    955.40x = 1,431.72 × 735.17
  4. Step 4: Simplify right side
    955.40x = 1,052,550.43
  5. Step 5: Solve for x
    x = 1,052,550.43/955.40
  6. Step 6: Final answer
    x = 1,101.69

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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.