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Finding the Fourth Proportional to 955.45, 1,436.42 and 762.91

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Solution

The fourth proportional to 955.45, 1,436.42 and 762.91 is: 1,146.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.45 : 1,436.42 = 762.91 : x
  2. Step 2: Convert to fraction form
    955.45/1,436.42 = 762.91/x
  3. Step 3: Cross multiply
    955.45x = 1,436.42 × 762.91
  4. Step 4: Simplify right side
    955.45x = 1,095,855.37
  5. Step 5: Solve for x
    x = 1,095,855.37/955.45
  6. Step 6: Final answer
    x = 1,146.95

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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.