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Finding the Fourth Proportional to 344.06, 474.72 and 316.40

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Solution

The fourth proportional to 344.06, 474.72 and 316.40 is: 436.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.06 : 474.72 = 316.40 : x
  2. Step 2: Convert to fraction form
    344.06/474.72 = 316.40/x
  3. Step 3: Cross multiply
    344.06x = 474.72 × 316.40
  4. Step 4: Simplify right side
    344.06x = 150,201.41
  5. Step 5: Solve for x
    x = 150,201.41/344.06
  6. Step 6: Final answer
    x = 436.56

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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.