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Finding the Fourth Proportional to 282.80, 424.17 and 145.79

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Solution

The fourth proportional to 282.80, 424.17 and 145.79 is: 218.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.80 : 424.17 = 145.79 : x
  2. Step 2: Convert to fraction form
    282.80/424.17 = 145.79/x
  3. Step 3: Cross multiply
    282.80x = 424.17 × 145.79
  4. Step 4: Simplify right side
    282.80x = 61,839.74
  5. Step 5: Solve for x
    x = 61,839.74/282.80
  6. Step 6: Final answer
    x = 218.67

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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.