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Finding the Fourth Proportional to 428.90, 591.84 and 263.16

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Solution

The fourth proportional to 428.90, 591.84 and 263.16 is: 363.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    428.90 : 591.84 = 263.16 : x
  2. Step 2: Convert to fraction form
    428.90/591.84 = 263.16/x
  3. Step 3: Cross multiply
    428.90x = 591.84 × 263.16
  4. Step 4: Simplify right side
    428.90x = 155,748.61
  5. Step 5: Solve for x
    x = 155,748.61/428.90
  6. Step 6: Final answer
    x = 363.14

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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.