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Finding the Fourth Proportional to 428.18, 591.12 and 262.44

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Solution

The fourth proportional to 428.18, 591.12 and 262.44 is: 362.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    428.18 : 591.12 = 262.44 : x
  2. Step 2: Convert to fraction form
    428.18/591.12 = 262.44/x
  3. Step 3: Cross multiply
    428.18x = 591.12 × 262.44
  4. Step 4: Simplify right side
    428.18x = 155,133.53
  5. Step 5: Solve for x
    x = 155,133.53/428.18
  6. Step 6: Final answer
    x = 362.31

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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.