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Finding the Fourth Proportional to 955.22, 1,318.01 and 624.14

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Solution

The fourth proportional to 955.22, 1,318.01 and 624.14 is: 861.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.22 : 1,318.01 = 624.14 : x
  2. Step 2: Convert to fraction form
    955.22/1,318.01 = 624.14/x
  3. Step 3: Cross multiply
    955.22x = 1,318.01 × 624.14
  4. Step 4: Simplify right side
    955.22x = 822,613.05
  5. Step 5: Solve for x
    x = 822,613.05/955.22
  6. Step 6: Final answer
    x = 861.18

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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.