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Finding the Fourth Proportional to 504.07, 756 and 138.81

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Solution

The fourth proportional to 504.07, 756 and 138.81 is: 208.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.07 : 756 = 138.81 : x
  2. Step 2: Convert to fraction form
    504.07/756 = 138.81/x
  3. Step 3: Cross multiply
    504.07x = 756 × 138.81
  4. Step 4: Simplify right side
    504.07x = 104,943.20
  5. Step 5: Solve for x
    x = 104,943.20/504.07
  6. Step 6: Final answer
    x = 208.19

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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.