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Finding the Fourth Proportional to 388.98, 578.82 and 375.75

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Solution

The fourth proportional to 388.98, 578.82 and 375.75 is: 559.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.98 : 578.82 = 375.75 : x
  2. Step 2: Convert to fraction form
    388.98/578.82 = 375.75/x
  3. Step 3: Cross multiply
    388.98x = 578.82 × 375.75
  4. Step 4: Simplify right side
    388.98x = 217,491.62
  5. Step 5: Solve for x
    x = 217,491.62/388.98
  6. Step 6: Final answer
    x = 559.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.