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Finding the Fourth Proportional to 472.19, 707.07 and 326.39

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Solution

The fourth proportional to 472.19, 707.07 and 326.39 is: 488.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.19 : 707.07 = 326.39 : x
  2. Step 2: Convert to fraction form
    472.19/707.07 = 326.39/x
  3. Step 3: Cross multiply
    472.19x = 707.07 × 326.39
  4. Step 4: Simplify right side
    472.19x = 230,780.58
  5. Step 5: Solve for x
    x = 230,780.58/472.19
  6. Step 6: Final answer
    x = 488.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.