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Finding the Fourth Proportional to 320.34, 479.40 and 292.94

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Solution

The fourth proportional to 320.34, 479.40 and 292.94 is: 438.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.34 : 479.40 = 292.94 : x
  2. Step 2: Convert to fraction form
    320.34/479.40 = 292.94/x
  3. Step 3: Cross multiply
    320.34x = 479.40 × 292.94
  4. Step 4: Simplify right side
    320.34x = 140,435.44
  5. Step 5: Solve for x
    x = 140,435.44/320.34
  6. Step 6: Final answer
    x = 438.39

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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.