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Finding the Fourth Proportional to 578.10, 797.49 and 381.36

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Solution

The fourth proportional to 578.10, 797.49 and 381.36 is: 526.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.10 : 797.49 = 381.36 : x
  2. Step 2: Convert to fraction form
    578.10/797.49 = 381.36/x
  3. Step 3: Cross multiply
    578.10x = 797.49 × 381.36
  4. Step 4: Simplify right side
    578.10x = 304,130.79
  5. Step 5: Solve for x
    x = 304,130.79/578.10
  6. Step 6: Final answer
    x = 526.09

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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.