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Finding the Fourth Proportional to 578.72, 797.36 and 381.88

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Solution

The fourth proportional to 578.72, 797.36 and 381.88 is: 526.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.72 : 797.36 = 381.88 : x
  2. Step 2: Convert to fraction form
    578.72/797.36 = 381.88/x
  3. Step 3: Cross multiply
    578.72x = 797.36 × 381.88
  4. Step 4: Simplify right side
    578.72x = 304,495.84
  5. Step 5: Solve for x
    x = 304,495.84/578.72
  6. Step 6: Final answer
    x = 526.15

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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.