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Finding the Fourth Proportional to 343.25, 473.70 and 188

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Solution

The fourth proportional to 343.25, 473.70 and 188 is: 259.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.25 : 473.70 = 188 : x
  2. Step 2: Convert to fraction form
    343.25/473.70 = 188/x
  3. Step 3: Cross multiply
    343.25x = 473.70 × 188
  4. Step 4: Simplify right side
    343.25x = 89,055.60
  5. Step 5: Solve for x
    x = 89,055.60/343.25
  6. Step 6: Final answer
    x = 259.45

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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.