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Finding the Fourth Proportional to 974.58, 1,461.71 and 281.09

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Solution

The fourth proportional to 974.58, 1,461.71 and 281.09 is: 421.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.58 : 1,461.71 = 281.09 : x
  2. Step 2: Convert to fraction form
    974.58/1,461.71 = 281.09/x
  3. Step 3: Cross multiply
    974.58x = 1,461.71 × 281.09
  4. Step 4: Simplify right side
    974.58x = 410,872.06
  5. Step 5: Solve for x
    x = 410,872.06/974.58
  6. Step 6: Final answer
    x = 421.59

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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.