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Finding the Fourth Proportional to 538.07, 742.12 and 351.77

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Solution

The fourth proportional to 538.07, 742.12 and 351.77 is: 485.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.07 : 742.12 = 351.77 : x
  2. Step 2: Convert to fraction form
    538.07/742.12 = 351.77/x
  3. Step 3: Cross multiply
    538.07x = 742.12 × 351.77
  4. Step 4: Simplify right side
    538.07x = 261,050.96
  5. Step 5: Solve for x
    x = 261,050.96/538.07
  6. Step 6: Final answer
    x = 485.17

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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.