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Finding the Fourth Proportional to 513.68, 708.28 and 348.00

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Solution

The fourth proportional to 513.68, 708.28 and 348.00 is: 479.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.68 : 708.28 = 348.00 : x
  2. Step 2: Convert to fraction form
    513.68/708.28 = 348.00/x
  3. Step 3: Cross multiply
    513.68x = 708.28 × 348.00
  4. Step 4: Simplify right side
    513.68x = 246,477.91
  5. Step 5: Solve for x
    x = 246,477.91/513.68
  6. Step 6: Final answer
    x = 479.83

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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.