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Finding the Fourth Proportional to 261.33, 389.43 and 252.63

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Solution

The fourth proportional to 261.33, 389.43 and 252.63 is: 376.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.33 : 389.43 = 252.63 : x
  2. Step 2: Convert to fraction form
    261.33/389.43 = 252.63/x
  3. Step 3: Cross multiply
    261.33x = 389.43 × 252.63
  4. Step 4: Simplify right side
    261.33x = 98,381.70
  5. Step 5: Solve for x
    x = 98,381.70/261.33
  6. Step 6: Final answer
    x = 376.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.