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Finding the Fourth Proportional to 281.92, 420.57 and 262.28

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Solution

The fourth proportional to 281.92, 420.57 and 262.28 is: 391.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.92 : 420.57 = 262.28 : x
  2. Step 2: Convert to fraction form
    281.92/420.57 = 262.28/x
  3. Step 3: Cross multiply
    281.92x = 420.57 × 262.28
  4. Step 4: Simplify right side
    281.92x = 110,307.10
  5. Step 5: Solve for x
    x = 110,307.10/281.92
  6. Step 6: Final answer
    x = 391.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.