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Finding the Fourth Proportional to 460.19, 690.39 and 135.56

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Solution

The fourth proportional to 460.19, 690.39 and 135.56 is: 203.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.19 : 690.39 = 135.56 : x
  2. Step 2: Convert to fraction form
    460.19/690.39 = 135.56/x
  3. Step 3: Cross multiply
    460.19x = 690.39 × 135.56
  4. Step 4: Simplify right side
    460.19x = 93,585.82
  5. Step 5: Solve for x
    x = 93,585.82/460.19
  6. Step 6: Final answer
    x = 203.37

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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.