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Finding the Fourth Proportional to 342.23, 471.56 and 316.99

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Solution

The fourth proportional to 342.23, 471.56 and 316.99 is: 436.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.23 : 471.56 = 316.99 : x
  2. Step 2: Convert to fraction form
    342.23/471.56 = 316.99/x
  3. Step 3: Cross multiply
    342.23x = 471.56 × 316.99
  4. Step 4: Simplify right side
    342.23x = 149,480.16
  5. Step 5: Solve for x
    x = 149,480.16/342.23
  6. Step 6: Final answer
    x = 436.79

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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.