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Finding the Fourth Proportional to 460.25, 690.49 and 135.61

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Solution

The fourth proportional to 460.25, 690.49 and 135.61 is: 203.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.25 : 690.49 = 135.61 : x
  2. Step 2: Convert to fraction form
    460.25/690.49 = 135.61/x
  3. Step 3: Cross multiply
    460.25x = 690.49 × 135.61
  4. Step 4: Simplify right side
    460.25x = 93,637.35
  5. Step 5: Solve for x
    x = 93,637.35/460.25
  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.