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Finding the Fourth Proportional to 386.58, 533.72 and 293.33

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Solution

The fourth proportional to 386.58, 533.72 and 293.33 is: 404.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.58 : 533.72 = 293.33 : x
  2. Step 2: Convert to fraction form
    386.58/533.72 = 293.33/x
  3. Step 3: Cross multiply
    386.58x = 533.72 × 293.33
  4. Step 4: Simplify right side
    386.58x = 156,558.16
  5. Step 5: Solve for x
    x = 156,558.16/386.58
  6. Step 6: Final answer
    x = 404.98

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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.