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Finding the Fourth Proportional to 320.92, 442.88 and 188.15

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Solution

The fourth proportional to 320.92, 442.88 and 188.15 is: 259.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.92 : 442.88 = 188.15 : x
  2. Step 2: Convert to fraction form
    320.92/442.88 = 188.15/x
  3. Step 3: Cross multiply
    320.92x = 442.88 × 188.15
  4. Step 4: Simplify right side
    320.92x = 83,327.87
  5. Step 5: Solve for x
    x = 83,327.87/320.92
  6. Step 6: Final answer
    x = 259.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.