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Finding the Fourth Proportional to 387.16, 533.81 and 269.23

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Solution

The fourth proportional to 387.16, 533.81 and 269.23 is: 371.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.16 : 533.81 = 269.23 : x
  2. Step 2: Convert to fraction form
    387.16/533.81 = 269.23/x
  3. Step 3: Cross multiply
    387.16x = 533.81 × 269.23
  4. Step 4: Simplify right side
    387.16x = 143,717.67
  5. Step 5: Solve for x
    x = 143,717.67/387.16
  6. Step 6: Final answer
    x = 371.21

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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.