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Finding the Fourth Proportional to 345.55, 476.85 and 198.18

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Solution

The fourth proportional to 345.55, 476.85 and 198.18 is: 273.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.55 : 476.85 = 198.18 : x
  2. Step 2: Convert to fraction form
    345.55/476.85 = 198.18/x
  3. Step 3: Cross multiply
    345.55x = 476.85 × 198.18
  4. Step 4: Simplify right side
    345.55x = 94,502.88
  5. Step 5: Solve for x
    x = 94,502.88/345.55
  6. Step 6: Final answer
    x = 273.49

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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.