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Finding the Fourth Proportional to 824.44, 1,237.06 and 391.64

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Solution

The fourth proportional to 824.44, 1,237.06 and 391.64 is: 587.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.44 : 1,237.06 = 391.64 : x
  2. Step 2: Convert to fraction form
    824.44/1,237.06 = 391.64/x
  3. Step 3: Cross multiply
    824.44x = 1,237.06 × 391.64
  4. Step 4: Simplify right side
    824.44x = 484,482.18
  5. Step 5: Solve for x
    x = 484,482.18/824.44
  6. Step 6: Final answer
    x = 587.65

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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.