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Finding the Fourth Proportional to 451.33, 672.50 and 429.28

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Solution

The fourth proportional to 451.33, 672.50 and 429.28 is: 639.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.33 : 672.50 = 429.28 : x
  2. Step 2: Convert to fraction form
    451.33/672.50 = 429.28/x
  3. Step 3: Cross multiply
    451.33x = 672.50 × 429.28
  4. Step 4: Simplify right side
    451.33x = 288,694.68
  5. Step 5: Solve for x
    x = 288,694.68/451.33
  6. Step 6: Final answer
    x = 639.66

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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.