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Finding the Fourth Proportional to 610.31, 841.91 and 388.86

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Solution

The fourth proportional to 610.31, 841.91 and 388.86 is: 536.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.31 : 841.91 = 388.86 : x
  2. Step 2: Convert to fraction form
    610.31/841.91 = 388.86/x
  3. Step 3: Cross multiply
    610.31x = 841.91 × 388.86
  4. Step 4: Simplify right side
    610.31x = 327,383.18
  5. Step 5: Solve for x
    x = 327,383.18/610.31
  6. Step 6: Final answer
    x = 536.43

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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.