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Finding the Fourth Proportional to 953.89, 1,315.93 and 622.33

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Solution

The fourth proportional to 953.89, 1,315.93 and 622.33 is: 858.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.89 : 1,315.93 = 622.33 : x
  2. Step 2: Convert to fraction form
    953.89/1,315.93 = 622.33/x
  3. Step 3: Cross multiply
    953.89x = 1,315.93 × 622.33
  4. Step 4: Simplify right side
    953.89x = 818,942.72
  5. Step 5: Solve for x
    x = 818,942.72/953.89
  6. Step 6: Final answer
    x = 858.53

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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.