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Finding the Fourth Proportional to 685.67, 944.04 and 623.31

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Solution

The fourth proportional to 685.67, 944.04 and 623.31 is: 858.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.67 : 944.04 = 623.31 : x
  2. Step 2: Convert to fraction form
    685.67/944.04 = 623.31/x
  3. Step 3: Cross multiply
    685.67x = 944.04 × 623.31
  4. Step 4: Simplify right side
    685.67x = 588,429.57
  5. Step 5: Solve for x
    x = 588,429.57/685.67
  6. Step 6: Final answer
    x = 858.19

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1.5x scale

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.