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Finding the Fourth Proportional to 320.58, 479.61 and 223.74

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Solution

The fourth proportional to 320.58, 479.61 and 223.74 is: 334.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.58 : 479.61 = 223.74 : x
  2. Step 2: Convert to fraction form
    320.58/479.61 = 223.74/x
  3. Step 3: Cross multiply
    320.58x = 479.61 × 223.74
  4. Step 4: Simplify right side
    320.58x = 107,307.94
  5. Step 5: Solve for x
    x = 107,307.94/320.58
  6. Step 6: Final answer
    x = 334.73

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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.