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Finding the Fourth Proportional to 259.56, 389.12 and 122.53

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Solution

The fourth proportional to 259.56, 389.12 and 122.53 is: 183.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.56 : 389.12 = 122.53 : x
  2. Step 2: Convert to fraction form
    259.56/389.12 = 122.53/x
  3. Step 3: Cross multiply
    259.56x = 389.12 × 122.53
  4. Step 4: Simplify right side
    259.56x = 47,678.87
  5. Step 5: Solve for x
    x = 47,678.87/259.56
  6. Step 6: Final answer
    x = 183.69

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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.