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Finding the Fourth Proportional to 260.68, 392.80 and 216.02

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Solution

The fourth proportional to 260.68, 392.80 and 216.02 is: 325.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.68 : 392.80 = 216.02 : x
  2. Step 2: Convert to fraction form
    260.68/392.80 = 216.02/x
  3. Step 3: Cross multiply
    260.68x = 392.80 × 216.02
  4. Step 4: Simplify right side
    260.68x = 84,852.66
  5. Step 5: Solve for x
    x = 84,852.66/260.68
  6. Step 6: Final answer
    x = 325.51

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.