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Finding the Fourth Proportional to 282.98, 424.53 and 128.92

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Solution

The fourth proportional to 282.98, 424.53 and 128.92 is: 193.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.98 : 424.53 = 128.92 : x
  2. Step 2: Convert to fraction form
    282.98/424.53 = 128.92/x
  3. Step 3: Cross multiply
    282.98x = 424.53 × 128.92
  4. Step 4: Simplify right side
    282.98x = 54,729.76
  5. Step 5: Solve for x
    x = 54,729.76/282.98
  6. Step 6: Final answer
    x = 193.41

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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.