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Finding the Fourth Proportional to 314.73, 434.86 and 303.64

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Solution

The fourth proportional to 314.73, 434.86 and 303.64 is: 419.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.73 : 434.86 = 303.64 : x
  2. Step 2: Convert to fraction form
    314.73/434.86 = 303.64/x
  3. Step 3: Cross multiply
    314.73x = 434.86 × 303.64
  4. Step 4: Simplify right side
    314.73x = 132,040.89
  5. Step 5: Solve for x
    x = 132,040.89/314.73
  6. Step 6: Final answer
    x = 419.54

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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.