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Finding the Fourth Proportional to 482.40, 665.71 and 261.35

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Solution

The fourth proportional to 482.40, 665.71 and 261.35 is: 360.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.40 : 665.71 = 261.35 : x
  2. Step 2: Convert to fraction form
    482.40/665.71 = 261.35/x
  3. Step 3: Cross multiply
    482.40x = 665.71 × 261.35
  4. Step 4: Simplify right side
    482.40x = 173,983.31
  5. Step 5: Solve for x
    x = 173,983.31/482.40
  6. Step 6: Final answer
    x = 360.66

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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.