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Finding the Fourth Proportional to 386.94, 532.32 and 381.18

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Solution

The fourth proportional to 386.94, 532.32 and 381.18 is: 524.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.94 : 532.32 = 381.18 : x
  2. Step 2: Convert to fraction form
    386.94/532.32 = 381.18/x
  3. Step 3: Cross multiply
    386.94x = 532.32 × 381.18
  4. Step 4: Simplify right side
    386.94x = 202,909.74
  5. Step 5: Solve for x
    x = 202,909.74/386.94
  6. Step 6: Final answer
    x = 524.40

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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.