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Finding the Fourth Proportional to 513.78, 709.11 and 374.10

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Solution

The fourth proportional to 513.78, 709.11 and 374.10 is: 516.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.78 : 709.11 = 374.10 : x
  2. Step 2: Convert to fraction form
    513.78/709.11 = 374.10/x
  3. Step 3: Cross multiply
    513.78x = 709.11 × 374.10
  4. Step 4: Simplify right side
    513.78x = 265,278.05
  5. Step 5: Solve for x
    x = 265,278.05/513.78
  6. Step 6: Final answer
    x = 516.33

Related Problems

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.