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Finding the Fourth Proportional to 482.81, 666.56 and 308.25

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Solution

The fourth proportional to 482.81, 666.56 and 308.25 is: 425.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.81 : 666.56 = 308.25 : x
  2. Step 2: Convert to fraction form
    482.81/666.56 = 308.25/x
  3. Step 3: Cross multiply
    482.81x = 666.56 × 308.25
  4. Step 4: Simplify right side
    482.81x = 205,467.89
  5. Step 5: Solve for x
    x = 205,467.89/482.81
  6. Step 6: Final answer
    x = 425.57

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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.