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Finding the Fourth Proportional to 504.58, 756.85 and 139.36

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Solution

The fourth proportional to 504.58, 756.85 and 139.36 is: 209.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.58 : 756.85 = 139.36 : x
  2. Step 2: Convert to fraction form
    504.58/756.85 = 139.36/x
  3. Step 3: Cross multiply
    504.58x = 756.85 × 139.36
  4. Step 4: Simplify right side
    504.58x = 105,474.62
  5. Step 5: Solve for x
    x = 105,474.62/504.58
  6. Step 6: Final answer
    x = 209.03

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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.