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Finding the Fourth Proportional to 573.92, 791.91 and 485.10

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Solution

The fourth proportional to 573.92, 791.91 and 485.10 is: 669.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.92 : 791.91 = 485.10 : x
  2. Step 2: Convert to fraction form
    573.92/791.91 = 485.10/x
  3. Step 3: Cross multiply
    573.92x = 791.91 × 485.10
  4. Step 4: Simplify right side
    573.92x = 384,155.54
  5. Step 5: Solve for x
    x = 384,155.54/573.92
  6. Step 6: Final answer
    x = 669.35

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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.