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Finding the Fourth Proportional to 259.83, 389.70 and 179.19

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Solution

The fourth proportional to 259.83, 389.70 and 179.19 is: 268.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.83 : 389.70 = 179.19 : x
  2. Step 2: Convert to fraction form
    259.83/389.70 = 179.19/x
  3. Step 3: Cross multiply
    259.83x = 389.70 × 179.19
  4. Step 4: Simplify right side
    259.83x = 69,830.34
  5. Step 5: Solve for x
    x = 69,830.34/259.83
  6. Step 6: Final answer
    x = 268.75

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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.