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Finding the Fourth Proportional to 987.77, 1,481.51 and 294.41

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Solution

The fourth proportional to 987.77, 1,481.51 and 294.41 is: 441.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    987.77 : 1,481.51 = 294.41 : x
  2. Step 2: Convert to fraction form
    987.77/1,481.51 = 294.41/x
  3. Step 3: Cross multiply
    987.77x = 1,481.51 × 294.41
  4. Step 4: Simplify right side
    987.77x = 436,175.80
  5. Step 5: Solve for x
    x = 436,175.80/987.77
  6. Step 6: Final answer
    x = 441.58

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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.