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Finding the Fourth Proportional to 345.49, 476.75 and 198.07

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Solution

The fourth proportional to 345.49, 476.75 and 198.07 is: 273.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.49 : 476.75 = 198.07 : x
  2. Step 2: Convert to fraction form
    345.49/476.75 = 198.07/x
  3. Step 3: Cross multiply
    345.49x = 476.75 × 198.07
  4. Step 4: Simplify right side
    345.49x = 94,429.18
  5. Step 5: Solve for x
    x = 94,429.18/345.49
  6. Step 6: Final answer
    x = 273.32

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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.