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Finding the Fourth Proportional to 320.62, 442.56 and 187.87

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Solution

The fourth proportional to 320.62, 442.56 and 187.87 is: 259.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.62 : 442.56 = 187.87 : x
  2. Step 2: Convert to fraction form
    320.62/442.56 = 187.87/x
  3. Step 3: Cross multiply
    320.62x = 442.56 × 187.87
  4. Step 4: Simplify right side
    320.62x = 83,144.70
  5. Step 5: Solve for x
    x = 83,144.70/320.62
  6. Step 6: Final answer
    x = 259.32

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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.