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Finding the Fourth Proportional to 428.47, 591.36 and 262.74

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Solution

The fourth proportional to 428.47, 591.36 and 262.74 is: 362.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    428.47 : 591.36 = 262.74 : x
  2. Step 2: Convert to fraction form
    428.47/591.36 = 262.74/x
  3. Step 3: Cross multiply
    428.47x = 591.36 × 262.74
  4. Step 4: Simplify right side
    428.47x = 155,373.93
  5. Step 5: Solve for x
    x = 155,373.93/428.47
  6. Step 6: Final answer
    x = 362.62

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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.