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Finding the Fourth Proportional to 461.89, 637.89 and 388.79

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Solution

The fourth proportional to 461.89, 637.89 and 388.79 is: 536.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.89 : 637.89 = 388.79 : x
  2. Step 2: Convert to fraction form
    461.89/637.89 = 388.79/x
  3. Step 3: Cross multiply
    461.89x = 637.89 × 388.79
  4. Step 4: Simplify right side
    461.89x = 248,005.18
  5. Step 5: Solve for x
    x = 248,005.18/461.89
  6. Step 6: Final answer
    x = 536.93

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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.