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Finding the Fourth Proportional to 259.68, 389.40 and 151.44

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Solution

The fourth proportional to 259.68, 389.40 and 151.44 is: 227.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.68 : 389.40 = 151.44 : x
  2. Step 2: Convert to fraction form
    259.68/389.40 = 151.44/x
  3. Step 3: Cross multiply
    259.68x = 389.40 × 151.44
  4. Step 4: Simplify right side
    259.68x = 58,970.74
  5. Step 5: Solve for x
    x = 58,970.74/259.68
  6. Step 6: Final answer
    x = 227.09

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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.