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Finding the Fourth Proportional to 384.81, 531.06 and 286.83

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Solution

The fourth proportional to 384.81, 531.06 and 286.83 is: 395.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.81 : 531.06 = 286.83 : x
  2. Step 2: Convert to fraction form
    384.81/531.06 = 286.83/x
  3. Step 3: Cross multiply
    384.81x = 531.06 × 286.83
  4. Step 4: Simplify right side
    384.81x = 152,323.94
  5. Step 5: Solve for x
    x = 152,323.94/384.81
  6. Step 6: Final answer
    x = 395.84

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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.