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Finding the Fourth Proportional to 513.64, 709.12 and 339.29

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Solution

The fourth proportional to 513.64, 709.12 and 339.29 is: 468.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.64 : 709.12 = 339.29 : x
  2. Step 2: Convert to fraction form
    513.64/709.12 = 339.29/x
  3. Step 3: Cross multiply
    513.64x = 709.12 × 339.29
  4. Step 4: Simplify right side
    513.64x = 240,597.32
  5. Step 5: Solve for x
    x = 240,597.32/513.64
  6. Step 6: Final answer
    x = 468.42

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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.