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Finding the Fourth Proportional to 259.45, 357.40 and 247.12

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Solution

The fourth proportional to 259.45, 357.40 and 247.12 is: 340.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.45 : 357.40 = 247.12 : x
  2. Step 2: Convert to fraction form
    259.45/357.40 = 247.12/x
  3. Step 3: Cross multiply
    259.45x = 357.40 × 247.12
  4. Step 4: Simplify right side
    259.45x = 88,320.69
  5. Step 5: Solve for x
    x = 88,320.69/259.45
  6. Step 6: Final answer
    x = 340.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.