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Finding the Fourth Proportional to 955.63, 1,318.80 and 535.98

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Solution

The fourth proportional to 955.63, 1,318.80 and 535.98 is: 739.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.63 : 1,318.80 = 535.98 : x
  2. Step 2: Convert to fraction form
    955.63/1,318.80 = 535.98/x
  3. Step 3: Cross multiply
    955.63x = 1,318.80 × 535.98
  4. Step 4: Simplify right side
    955.63x = 706,850.42
  5. Step 5: Solve for x
    x = 706,850.42/955.63
  6. Step 6: Final answer
    x = 739.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.