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Finding the Fourth Proportional to 938.42, 1,295.44 and 606.78

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Solution

The fourth proportional to 938.42, 1,295.44 and 606.78 is: 837.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.42 : 1,295.44 = 606.78 : x
  2. Step 2: Convert to fraction form
    938.42/1,295.44 = 606.78/x
  3. Step 3: Cross multiply
    938.42x = 1,295.44 × 606.78
  4. Step 4: Simplify right side
    938.42x = 786,047.08
  5. Step 5: Solve for x
    x = 786,047.08/938.42
  6. Step 6: Final answer
    x = 837.63

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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.