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Finding the Fourth Proportional to 438.32, 655.86 and 360.56

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Solution

The fourth proportional to 438.32, 655.86 and 360.56 is: 539.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.32 : 655.86 = 360.56 : x
  2. Step 2: Convert to fraction form
    438.32/655.86 = 360.56/x
  3. Step 3: Cross multiply
    438.32x = 655.86 × 360.56
  4. Step 4: Simplify right side
    438.32x = 236,476.88
  5. Step 5: Solve for x
    x = 236,476.88/438.32
  6. Step 6: Final answer
    x = 539.51

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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.