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Finding the Fourth Proportional to 513.27, 707.81 and 316.53

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Solution

The fourth proportional to 513.27, 707.81 and 316.53 is: 436.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.27 : 707.81 = 316.53 : x
  2. Step 2: Convert to fraction form
    513.27/707.81 = 316.53/x
  3. Step 3: Cross multiply
    513.27x = 707.81 × 316.53
  4. Step 4: Simplify right side
    513.27x = 224,041.52
  5. Step 5: Solve for x
    x = 224,041.52/513.27
  6. Step 6: Final answer
    x = 436.50

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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.