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Finding the Fourth Proportional to 260.13, 358.98 and 143.70

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Solution

The fourth proportional to 260.13, 358.98 and 143.70 is: 198.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.13 : 358.98 = 143.70 : x
  2. Step 2: Convert to fraction form
    260.13/358.98 = 143.70/x
  3. Step 3: Cross multiply
    260.13x = 358.98 × 143.70
  4. Step 4: Simplify right side
    260.13x = 51,585.43
  5. Step 5: Solve for x
    x = 51,585.43/260.13
  6. Step 6: Final answer
    x = 198.31

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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.