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Finding the Fourth Proportional to 479.36, 714.10 and 449.48

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Solution

The fourth proportional to 479.36, 714.10 and 449.48 is: 669.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.36 : 714.10 = 449.48 : x
  2. Step 2: Convert to fraction form
    479.36/714.10 = 449.48/x
  3. Step 3: Cross multiply
    479.36x = 714.10 × 449.48
  4. Step 4: Simplify right side
    479.36x = 320,973.67
  5. Step 5: Solve for x
    x = 320,973.67/479.36
  6. Step 6: Final answer
    x = 669.59

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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.