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Finding the Fourth Proportional to 669.47, 919.90 and 544.82

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Solution

The fourth proportional to 669.47, 919.90 and 544.82 is: 748.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.47 : 919.90 = 544.82 : x
  2. Step 2: Convert to fraction form
    669.47/919.90 = 544.82/x
  3. Step 3: Cross multiply
    669.47x = 919.90 × 544.82
  4. Step 4: Simplify right side
    669.47x = 501,179.92
  5. Step 5: Solve for x
    x = 501,179.92/669.47
  6. Step 6: Final answer
    x = 748.62

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.