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Finding the Fourth Proportional to 282.63, 389.81 and 243.35

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Solution

The fourth proportional to 282.63, 389.81 and 243.35 is: 335.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.63 : 389.81 = 243.35 : x
  2. Step 2: Convert to fraction form
    282.63/389.81 = 243.35/x
  3. Step 3: Cross multiply
    282.63x = 389.81 × 243.35
  4. Step 4: Simplify right side
    282.63x = 94,860.26
  5. Step 5: Solve for x
    x = 94,860.26/282.63
  6. Step 6: Final answer
    x = 335.63

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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.