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Finding the Fourth Proportional to 483.93, 667.85 and 386.39

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Solution

The fourth proportional to 483.93, 667.85 and 386.39 is: 533.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.93 : 667.85 = 386.39 : x
  2. Step 2: Convert to fraction form
    483.93/667.85 = 386.39/x
  3. Step 3: Cross multiply
    483.93x = 667.85 × 386.39
  4. Step 4: Simplify right side
    483.93x = 258,050.30
  5. Step 5: Solve for x
    x = 258,050.30/483.93
  6. Step 6: Final answer
    x = 533.24

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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.