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Finding the Fourth Proportional to 386.53, 579.15 and 283.85

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Solution

The fourth proportional to 386.53, 579.15 and 283.85 is: 425.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.53 : 579.15 = 283.85 : x
  2. Step 2: Convert to fraction form
    386.53/579.15 = 283.85/x
  3. Step 3: Cross multiply
    386.53x = 579.15 × 283.85
  4. Step 4: Simplify right side
    386.53x = 164,394.24
  5. Step 5: Solve for x
    x = 164,394.24/386.53
  6. Step 6: Final answer
    x = 425.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.