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Finding the Fourth Proportional to 538.65, 807.93 and 385.29

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Solution

The fourth proportional to 538.65, 807.93 and 385.29 is: 577.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.65 : 807.93 = 385.29 : x
  2. Step 2: Convert to fraction form
    538.65/807.93 = 385.29/x
  3. Step 3: Cross multiply
    538.65x = 807.93 × 385.29
  4. Step 4: Simplify right side
    538.65x = 311,287.35
  5. Step 5: Solve for x
    x = 311,287.35/538.65
  6. Step 6: Final answer
    x = 577.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.