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Finding the Fourth Proportional to 504.82, 757.09 and 139.63

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Solution

The fourth proportional to 504.82, 757.09 and 139.63 is: 209.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.82 : 757.09 = 139.63 : x
  2. Step 2: Convert to fraction form
    504.82/757.09 = 139.63/x
  3. Step 3: Cross multiply
    504.82x = 757.09 × 139.63
  4. Step 4: Simplify right side
    504.82x = 105,712.48
  5. Step 5: Solve for x
    x = 105,712.48/504.82
  6. Step 6: Final answer
    x = 209.41

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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.