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Finding the Fourth Proportional to 483.93, 668.46 and 391.02

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Solution

The fourth proportional to 483.93, 668.46 and 391.02 is: 540.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.93 : 668.46 = 391.02 : x
  2. Step 2: Convert to fraction form
    483.93/668.46 = 391.02/x
  3. Step 3: Cross multiply
    483.93x = 668.46 × 391.02
  4. Step 4: Simplify right side
    483.93x = 261,381.23
  5. Step 5: Solve for x
    x = 261,381.23/483.93
  6. Step 6: Final answer
    x = 540.12

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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.