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Finding the Fourth Proportional to 386.72, 534.38 and 276.01

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Solution

The fourth proportional to 386.72, 534.38 and 276.01 is: 381.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.72 : 534.38 = 276.01 : x
  2. Step 2: Convert to fraction form
    386.72/534.38 = 276.01/x
  3. Step 3: Cross multiply
    386.72x = 534.38 × 276.01
  4. Step 4: Simplify right side
    386.72x = 147,491.51
  5. Step 5: Solve for x
    x = 147,491.51/386.72
  6. Step 6: Final answer
    x = 381.39

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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.