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Finding the Fourth Proportional to 539.34, 808.68 and 386.25

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Solution

The fourth proportional to 539.34, 808.68 and 386.25 is: 579.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.34 : 808.68 = 386.25 : x
  2. Step 2: Convert to fraction form
    539.34/808.68 = 386.25/x
  3. Step 3: Cross multiply
    539.34x = 808.68 × 386.25
  4. Step 4: Simplify right side
    539.34x = 312,352.65
  5. Step 5: Solve for x
    x = 312,352.65/539.34
  6. Step 6: Final answer
    x = 579.14

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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.