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Finding the Fourth Proportional to 504.47, 756.68 and 139.27

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Solution

The fourth proportional to 504.47, 756.68 and 139.27 is: 208.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.47 : 756.68 = 139.27 : x
  2. Step 2: Convert to fraction form
    504.47/756.68 = 139.27/x
  3. Step 3: Cross multiply
    504.47x = 756.68 × 139.27
  4. Step 4: Simplify right side
    504.47x = 105,382.82
  5. Step 5: Solve for x
    x = 105,382.82/504.47
  6. Step 6: Final answer
    x = 208.90

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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.