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Finding the Fourth Proportional to 824.47, 1,137.44 and 492.77

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Solution

The fourth proportional to 824.47, 1,137.44 and 492.77 is: 679.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.47 : 1,137.44 = 492.77 : x
  2. Step 2: Convert to fraction form
    824.47/1,137.44 = 492.77/x
  3. Step 3: Cross multiply
    824.47x = 1,137.44 × 492.77
  4. Step 4: Simplify right side
    824.47x = 560,493.84
  5. Step 5: Solve for x
    x = 560,493.84/824.47
  6. Step 6: Final answer
    x = 679.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.