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Finding the Fourth Proportional to 259.20, 388.94 and 96.93

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Solution

The fourth proportional to 259.20, 388.94 and 96.93 is: 145.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.20 : 388.94 = 96.93 : x
  2. Step 2: Convert to fraction form
    259.20/388.94 = 96.93/x
  3. Step 3: Cross multiply
    259.20x = 388.94 × 96.93
  4. Step 4: Simplify right side
    259.20x = 37,699.47
  5. Step 5: Solve for x
    x = 37,699.47/259.20
  6. Step 6: Final answer
    x = 145.45

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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.