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Finding the Fourth Proportional to 479.85, 716.32 and 448.56

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Solution

The fourth proportional to 479.85, 716.32 and 448.56 is: 669.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.85 : 716.32 = 448.56 : x
  2. Step 2: Convert to fraction form
    479.85/716.32 = 448.56/x
  3. Step 3: Cross multiply
    479.85x = 716.32 × 448.56
  4. Step 4: Simplify right side
    479.85x = 321,313.81
  5. Step 5: Solve for x
    x = 321,313.81/479.85
  6. Step 6: Final answer
    x = 669.61

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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.