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Finding the Fourth Proportional to 504.05, 756.05 and 138.86

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Solution

The fourth proportional to 504.05, 756.05 and 138.86 is: 208.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.05 : 756.05 = 138.86 : x
  2. Step 2: Convert to fraction form
    504.05/756.05 = 138.86/x
  3. Step 3: Cross multiply
    504.05x = 756.05 × 138.86
  4. Step 4: Simplify right side
    504.05x = 104,984.41
  5. Step 5: Solve for x
    x = 104,984.41/504.05
  6. Step 6: Final answer
    x = 208.28

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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.