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Finding the Fourth Proportional to 458.82, 688.64 and 285.82

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Solution

The fourth proportional to 458.82, 688.64 and 285.82 is: 428.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.82 : 688.64 = 285.82 : x
  2. Step 2: Convert to fraction form
    458.82/688.64 = 285.82/x
  3. Step 3: Cross multiply
    458.82x = 688.64 × 285.82
  4. Step 4: Simplify right side
    458.82x = 196,827.08
  5. Step 5: Solve for x
    x = 196,827.08/458.82
  6. Step 6: Final answer
    x = 428.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.