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Finding the Fourth Proportional to 282.81, 423.82 and 145.57

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Solution

The fourth proportional to 282.81, 423.82 and 145.57 is: 218.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.81 : 423.82 = 145.57 : x
  2. Step 2: Convert to fraction form
    282.81/423.82 = 145.57/x
  3. Step 3: Cross multiply
    282.81x = 423.82 × 145.57
  4. Step 4: Simplify right side
    282.81x = 61,694.58
  5. Step 5: Solve for x
    x = 61,694.58/282.81
  6. Step 6: Final answer
    x = 218.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.