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Finding the Fourth Proportional to 513.90, 708.18 and 358.38

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Solution

The fourth proportional to 513.90, 708.18 and 358.38 is: 493.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.90 : 708.18 = 358.38 : x
  2. Step 2: Convert to fraction form
    513.90/708.18 = 358.38/x
  3. Step 3: Cross multiply
    513.90x = 708.18 × 358.38
  4. Step 4: Simplify right side
    513.90x = 253,797.55
  5. Step 5: Solve for x
    x = 253,797.55/513.90
  6. Step 6: Final answer
    x = 493.87

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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.