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Finding the Fourth Proportional to 955.36, 1,431.82 and 608.58

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Solution

The fourth proportional to 955.36, 1,431.82 and 608.58 is: 912.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.36 : 1,431.82 = 608.58 : x
  2. Step 2: Convert to fraction form
    955.36/1,431.82 = 608.58/x
  3. Step 3: Cross multiply
    955.36x = 1,431.82 × 608.58
  4. Step 4: Simplify right side
    955.36x = 871,377.02
  5. Step 5: Solve for x
    x = 871,377.02/955.36
  6. Step 6: Final answer
    x = 912.09

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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.