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Finding the Fourth Proportional to 513.28, 707.88 and 313.96

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Solution

The fourth proportional to 513.28, 707.88 and 313.96 is: 432.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.28 : 707.88 = 313.96 : x
  2. Step 2: Convert to fraction form
    513.28/707.88 = 313.96/x
  3. Step 3: Cross multiply
    513.28x = 707.88 × 313.96
  4. Step 4: Simplify right side
    513.28x = 222,246.00
  5. Step 5: Solve for x
    x = 222,246.00/513.28
  6. Step 6: Final answer
    x = 432.99

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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.