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Finding the Fourth Proportional to 388.65, 536.97 and 384.81

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Solution

The fourth proportional to 388.65, 536.97 and 384.81 is: 531.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.65 : 536.97 = 384.81 : x
  2. Step 2: Convert to fraction form
    388.65/536.97 = 384.81/x
  3. Step 3: Cross multiply
    388.65x = 536.97 × 384.81
  4. Step 4: Simplify right side
    388.65x = 206,631.43
  5. Step 5: Solve for x
    x = 206,631.43/388.65
  6. Step 6: Final answer
    x = 531.66

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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.