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Finding the Fourth Proportional to 513.48, 709.38 and 358.68

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Solution

The fourth proportional to 513.48, 709.38 and 358.68 is: 495.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.48 : 709.38 = 358.68 : x
  2. Step 2: Convert to fraction form
    513.48/709.38 = 358.68/x
  3. Step 3: Cross multiply
    513.48x = 709.38 × 358.68
  4. Step 4: Simplify right side
    513.48x = 254,440.42
  5. Step 5: Solve for x
    x = 254,440.42/513.48
  6. Step 6: Final answer
    x = 495.52

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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.