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Finding the Fourth Proportional to 938.41, 1,407.61 and 245.08

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Solution

The fourth proportional to 938.41, 1,407.61 and 245.08 is: 367.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.41 : 1,407.61 = 245.08 : x
  2. Step 2: Convert to fraction form
    938.41/1,407.61 = 245.08/x
  3. Step 3: Cross multiply
    938.41x = 1,407.61 × 245.08
  4. Step 4: Simplify right side
    938.41x = 344,977.06
  5. Step 5: Solve for x
    x = 344,977.06/938.41
  6. Step 6: Final answer
    x = 367.62

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.