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Finding the Fourth Proportional to 481.32, 718.95 and 399.24

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Solution

The fourth proportional to 481.32, 718.95 and 399.24 is: 596.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.32 : 718.95 = 399.24 : x
  2. Step 2: Convert to fraction form
    481.32/718.95 = 399.24/x
  3. Step 3: Cross multiply
    481.32x = 718.95 × 399.24
  4. Step 4: Simplify right side
    481.32x = 287,033.60
  5. Step 5: Solve for x
    x = 287,033.60/481.32
  6. Step 6: Final answer
    x = 596.35

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.