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Finding the Fourth Proportional to 504.02, 756.03 and 138.80

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Solution

The fourth proportional to 504.02, 756.03 and 138.80 is: 208.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.02 : 756.03 = 138.80 : x
  2. Step 2: Convert to fraction form
    504.02/756.03 = 138.80/x
  3. Step 3: Cross multiply
    504.02x = 756.03 × 138.80
  4. Step 4: Simplify right side
    504.02x = 104,936.96
  5. Step 5: Solve for x
    x = 104,936.96/504.02
  6. Step 6: Final answer
    x = 208.20

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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.