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Finding the Fourth Proportional to 314.94, 434.72 and 304.68

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Solution

The fourth proportional to 314.94, 434.72 and 304.68 is: 420.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.94 : 434.72 = 304.68 : x
  2. Step 2: Convert to fraction form
    314.94/434.72 = 304.68/x
  3. Step 3: Cross multiply
    314.94x = 434.72 × 304.68
  4. Step 4: Simplify right side
    314.94x = 132,450.49
  5. Step 5: Solve for x
    x = 132,450.49/314.94
  6. Step 6: Final answer
    x = 420.56

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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.