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Finding the Fourth Proportional to 342.75, 473.21 and 237.80

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Solution

The fourth proportional to 342.75, 473.21 and 237.80 is: 328.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.75 : 473.21 = 237.80 : x
  2. Step 2: Convert to fraction form
    342.75/473.21 = 237.80/x
  3. Step 3: Cross multiply
    342.75x = 473.21 × 237.80
  4. Step 4: Simplify right side
    342.75x = 112,530.22
  5. Step 5: Solve for x
    x = 112,530.22/342.75
  6. Step 6: Final answer
    x = 328.32

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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.