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Finding the Fourth Proportional to 306.25, 459.15 and 123.51

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Solution

The fourth proportional to 306.25, 459.15 and 123.51 is: 185.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.25 : 459.15 = 123.51 : x
  2. Step 2: Convert to fraction form
    306.25/459.15 = 123.51/x
  3. Step 3: Cross multiply
    306.25x = 459.15 × 123.51
  4. Step 4: Simplify right side
    306.25x = 56,709.62
  5. Step 5: Solve for x
    x = 56,709.62/306.25
  6. Step 6: Final answer
    x = 185.17

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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.