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Finding the Fourth Proportional to 282.07, 423.09 and 76.63

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Solution

The fourth proportional to 282.07, 423.09 and 76.63 is: 114.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.07 : 423.09 = 76.63 : x
  2. Step 2: Convert to fraction form
    282.07/423.09 = 76.63/x
  3. Step 3: Cross multiply
    282.07x = 423.09 × 76.63
  4. Step 4: Simplify right side
    282.07x = 32,421.39
  5. Step 5: Solve for x
    x = 32,421.39/282.07
  6. Step 6: Final answer
    x = 114.94

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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.