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Finding the Fourth Proportional to 573.17, 791.25 and 386.90

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Solution

The fourth proportional to 573.17, 791.25 and 386.90 is: 534.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.17 : 791.25 = 386.90 : x
  2. Step 2: Convert to fraction form
    573.17/791.25 = 386.90/x
  3. Step 3: Cross multiply
    573.17x = 791.25 × 386.90
  4. Step 4: Simplify right side
    573.17x = 306,130.67
  5. Step 5: Solve for x
    x = 306,130.67/573.17
  6. Step 6: Final answer
    x = 534.11

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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.