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Finding the Fourth Proportional to 459.14, 687.84 and 285.26

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Solution

The fourth proportional to 459.14, 687.84 and 285.26 is: 427.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.14 : 687.84 = 285.26 : x
  2. Step 2: Convert to fraction form
    459.14/687.84 = 285.26/x
  3. Step 3: Cross multiply
    459.14x = 687.84 × 285.26
  4. Step 4: Simplify right side
    459.14x = 196,213.24
  5. Step 5: Solve for x
    x = 196,213.24/459.14
  6. Step 6: Final answer
    x = 427.35

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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.