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Finding the Fourth Proportional to 573.24, 791.72 and 386.40

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Solution

The fourth proportional to 573.24, 791.72 and 386.40 is: 533.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.24 : 791.72 = 386.40 : x
  2. Step 2: Convert to fraction form
    573.24/791.72 = 386.40/x
  3. Step 3: Cross multiply
    573.24x = 791.72 × 386.40
  4. Step 4: Simplify right side
    573.24x = 305,920.66
  5. Step 5: Solve for x
    x = 305,920.66/573.24
  6. Step 6: Final answer
    x = 533.67

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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.