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Finding the Fourth Proportional to 345.90, 477.30 and 190.64

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Solution

The fourth proportional to 345.90, 477.30 and 190.64 is: 263.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.90 : 477.30 = 190.64 : x
  2. Step 2: Convert to fraction form
    345.90/477.30 = 190.64/x
  3. Step 3: Cross multiply
    345.90x = 477.30 × 190.64
  4. Step 4: Simplify right side
    345.90x = 90,992.47
  5. Step 5: Solve for x
    x = 90,992.47/345.90
  6. Step 6: Final answer
    x = 263.06

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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.