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Finding the Fourth Proportional to 386.88, 583.77 and 371.88

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Solution

The fourth proportional to 386.88, 583.77 and 371.88 is: 561.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.88 : 583.77 = 371.88 : x
  2. Step 2: Convert to fraction form
    386.88/583.77 = 371.88/x
  3. Step 3: Cross multiply
    386.88x = 583.77 × 371.88
  4. Step 4: Simplify right side
    386.88x = 217,092.39
  5. Step 5: Solve for x
    x = 217,092.39/386.88
  6. Step 6: Final answer
    x = 561.14

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.