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Finding the Fourth Proportional to 932.50, 1,287.12 and 622

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Solution

The fourth proportional to 932.50, 1,287.12 and 622 is: 858.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.50 : 1,287.12 = 622 : x
  2. Step 2: Convert to fraction form
    932.50/1,287.12 = 622/x
  3. Step 3: Cross multiply
    932.50x = 1,287.12 × 622
  4. Step 4: Simplify right side
    932.50x = 800,588.64
  5. Step 5: Solve for x
    x = 800,588.64/932.50
  6. Step 6: Final answer
    x = 858.54

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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.