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Finding the Fourth Proportional to 460.26, 690.41 and 135.63

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Solution

The fourth proportional to 460.26, 690.41 and 135.63 is: 203.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.26 : 690.41 = 135.63 : x
  2. Step 2: Convert to fraction form
    460.26/690.41 = 135.63/x
  3. Step 3: Cross multiply
    460.26x = 690.41 × 135.63
  4. Step 4: Simplify right side
    460.26x = 93,640.31
  5. Step 5: Solve for x
    x = 93,640.31/460.26
  6. Step 6: Final answer
    x = 203.45

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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.