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Finding the Fourth Proportional to 438.99, 655.32 and 376.62

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Solution

The fourth proportional to 438.99, 655.32 and 376.62 is: 562.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.99 : 655.32 = 376.62 : x
  2. Step 2: Convert to fraction form
    438.99/655.32 = 376.62/x
  3. Step 3: Cross multiply
    438.99x = 655.32 × 376.62
  4. Step 4: Simplify right side
    438.99x = 246,806.62
  5. Step 5: Solve for x
    x = 246,806.62/438.99
  6. Step 6: Final answer
    x = 562.21

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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.