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Finding the Fourth Proportional to 345.22, 476.41 and 187.85

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Solution

The fourth proportional to 345.22, 476.41 and 187.85 is: 259.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.22 : 476.41 = 187.85 : x
  2. Step 2: Convert to fraction form
    345.22/476.41 = 187.85/x
  3. Step 3: Cross multiply
    345.22x = 476.41 × 187.85
  4. Step 4: Simplify right side
    345.22x = 89,492.68
  5. Step 5: Solve for x
    x = 89,492.68/345.22
  6. Step 6: Final answer
    x = 259.23

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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.