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Finding the Fourth Proportional to 482.25, 665.55 and 275.25

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Solution

The fourth proportional to 482.25, 665.55 and 275.25 is: 379.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.25 : 665.55 = 275.25 : x
  2. Step 2: Convert to fraction form
    482.25/665.55 = 275.25/x
  3. Step 3: Cross multiply
    482.25x = 665.55 × 275.25
  4. Step 4: Simplify right side
    482.25x = 183,192.64
  5. Step 5: Solve for x
    x = 183,192.64/482.25
  6. Step 6: Final answer
    x = 379.87

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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.