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Finding the Fourth Proportional to 460.39, 690.40 and 186.43

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Solution

The fourth proportional to 460.39, 690.40 and 186.43 is: 279.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.39 : 690.40 = 186.43 : x
  2. Step 2: Convert to fraction form
    460.39/690.40 = 186.43/x
  3. Step 3: Cross multiply
    460.39x = 690.40 × 186.43
  4. Step 4: Simplify right side
    460.39x = 128,711.27
  5. Step 5: Solve for x
    x = 128,711.27/460.39
  6. Step 6: Final answer
    x = 279.57

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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.