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Finding the Fourth Proportional to 345.18, 476.32 and 189.92

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Solution

The fourth proportional to 345.18, 476.32 and 189.92 is: 262.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.18 : 476.32 = 189.92 : x
  2. Step 2: Convert to fraction form
    345.18/476.32 = 189.92/x
  3. Step 3: Cross multiply
    345.18x = 476.32 × 189.92
  4. Step 4: Simplify right side
    345.18x = 90,462.69
  5. Step 5: Solve for x
    x = 90,462.69/345.18
  6. Step 6: Final answer
    x = 262.07

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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.