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Finding the Fourth Proportional to 938.09, 1,295.12 and 623.27

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Solution

The fourth proportional to 938.09, 1,295.12 and 623.27 is: 860.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.09 : 1,295.12 = 623.27 : x
  2. Step 2: Convert to fraction form
    938.09/1,295.12 = 623.27/x
  3. Step 3: Cross multiply
    938.09x = 1,295.12 × 623.27
  4. Step 4: Simplify right side
    938.09x = 807,209.44
  5. Step 5: Solve for x
    x = 807,209.44/938.09
  6. Step 6: Final answer
    x = 860.48

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Double scale
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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.