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Finding the Fourth Proportional to 459.25, 687.15 and 322.57

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Solution

The fourth proportional to 459.25, 687.15 and 322.57 is: 482.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.25 : 687.15 = 322.57 : x
  2. Step 2: Convert to fraction form
    459.25/687.15 = 322.57/x
  3. Step 3: Cross multiply
    459.25x = 687.15 × 322.57
  4. Step 4: Simplify right side
    459.25x = 221,653.98
  5. Step 5: Solve for x
    x = 221,653.98/459.25
  6. Step 6: Final answer
    x = 482.64

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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.