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Finding the Fourth Proportional to 538.14, 810.07 and 385.14

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Solution

The fourth proportional to 538.14, 810.07 and 385.14 is: 579.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.14 : 810.07 = 385.14 : x
  2. Step 2: Convert to fraction form
    538.14/810.07 = 385.14/x
  3. Step 3: Cross multiply
    538.14x = 810.07 × 385.14
  4. Step 4: Simplify right side
    538.14x = 311,990.36
  5. Step 5: Solve for x
    x = 311,990.36/538.14
  6. Step 6: Final answer
    x = 579.76

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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.