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Finding the Fourth Proportional to 428.07, 591.06 and 323.34

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Solution

The fourth proportional to 428.07, 591.06 and 323.34 is: 446.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    428.07 : 591.06 = 323.34 : x
  2. Step 2: Convert to fraction form
    428.07/591.06 = 323.34/x
  3. Step 3: Cross multiply
    428.07x = 591.06 × 323.34
  4. Step 4: Simplify right side
    428.07x = 191,113.34
  5. Step 5: Solve for x
    x = 191,113.34/428.07
  6. Step 6: Final answer
    x = 446.45

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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.