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Finding the Fourth Proportional to 386.01, 531.16 and 383.61

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Solution

The fourth proportional to 386.01, 531.16 and 383.61 is: 527.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.01 : 531.16 = 383.61 : x
  2. Step 2: Convert to fraction form
    386.01/531.16 = 383.61/x
  3. Step 3: Cross multiply
    386.01x = 531.16 × 383.61
  4. Step 4: Simplify right side
    386.01x = 203,758.29
  5. Step 5: Solve for x
    x = 203,758.29/386.01
  6. Step 6: Final answer
    x = 527.86

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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.