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Finding the Fourth Proportional to 513.51, 708.68 and 317

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Solution

The fourth proportional to 513.51, 708.68 and 317 is: 437.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.51 : 708.68 = 317 : x
  2. Step 2: Convert to fraction form
    513.51/708.68 = 317/x
  3. Step 3: Cross multiply
    513.51x = 708.68 × 317
  4. Step 4: Simplify right side
    513.51x = 224,651.56
  5. Step 5: Solve for x
    x = 224,651.56/513.51
  6. Step 6: Final answer
    x = 437.48

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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.