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Finding the Fourth Proportional to 438.12, 655.29 and 365.04

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Solution

The fourth proportional to 438.12, 655.29 and 365.04 is: 545.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.12 : 655.29 = 365.04 : x
  2. Step 2: Convert to fraction form
    438.12/655.29 = 365.04/x
  3. Step 3: Cross multiply
    438.12x = 655.29 × 365.04
  4. Step 4: Simplify right side
    438.12x = 239,207.06
  5. Step 5: Solve for x
    x = 239,207.06/438.12
  6. Step 6: Final answer
    x = 545.99

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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.